Excel Formulas Made Easy - Learn more than 100 Formulas

Learn Excel formulas with this comprehensive course taking you from the fundamentals to writing advanced formulas
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  • Lectures 76
  • Contents Video: 6.5 hours
    Other: 18 mins
  • Skill Level All Levels
  • Languages English
  • Includes Lifetime access
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About This Course

Published 4/2015 English

Course Description

Excel Formulas can seem daunting and even scary at first when beginning. On this course Excel formulas are made easy as you learn all the essential skills to writing formulas.

Master Excel Formulas Easily with this Comprehensive Course

  • Understand Excel formulas inside out.
  • Learn over 55 different Excel functions.
  • Write complex formulas with ease.
  • Recognise formula errors and fix common problems.

Learn Everything You Need to Write Formulas with Ease.

Formulas are what drive Excel. They are the muscles allowing users to manipulate, lookup, aggregate and test data with ease.

Learning how to write formulas is an important skill for any Excel user looking to develop their talents.

Content and Overview

This course was designed for anybody who needs to be able to confidently work with formulas in Excel. It is suitable both for complete beginners who want to start from the basics, and for those that have some experience but want to take things further.

The course is broken into different sections. It starts with building an understanding of the different elements of a formula, what the various symbols mean, some basic functions and different techniques for referencing cells.

Each section then focuses on a specific function category such as date or lookup functions. It starts to take things further by tackling mini projects and looking at more advanced formulas.

In over 75 lectures this course will teach you all the necessary skills to write advanced formulas with ease, and make those formula demons a thing of the past.

Working files are provided so that you can follow along and practice. You can also get assistance from myself with any queries you may have.

What are the requirements?

  • Only a basic use of Excel is required as this course starts from scratch in understanding and creating formulas in Excel.
  • Excel 2013 is used on the course, but the lessons apply to any version of Excel. When a formula is new to a specific version of Excel this will be stated.

What am I going to get from this course?

  • Write advanced formulas for summing and counting values in a list.
  • Use lookup functions to fetch values on a spreadsheet.
  • Perform calculations with dates and times
  • Use formulas to clean and prepare data for analysis.
  • Identify and solve formula errors

What is the target audience?

  • Newbies to formulas in Excel who need to learn the formulas on their spreadsheets.
  • Excel users who can write formulas but want to take their skills further and learn some advanced Excel formula techniques.

What you get with this course?

Not for you? No problem.
30 day money back guarantee.

Forever yours.
Lifetime access.

Learn on the go.
Desktop, iOS and Android.

Get rewarded.
Certificate of completion.

Curriculum

Section 1: Introduction
03:06

This first lesson includes;

  • An introduction from your instructor, Alan Murray.
  • What to expect from the course.
  • How you can participate to get the most out of the course.
Course Files - Download these files to follow along
Article
Section 2: Formulas in a Nutshell
09:37

This lesson is for formula beginners. It explains from the start how a formula is constructed and some 'need to know' formula facts.

The lessons covers;

  • How to write a formula to perform basic arithmetic operations such as add, subtract, multiple and divide.
  • Different operators (symbols) which you may find in a formula.
  • How to edit an existing formula.
06:02

When entering a formula in Excel you need to be aware of the order of calculation, and how to control it.

This lesson covers;

  • What the order of calculation is and how it could affect you.
  • How to determine the order using parentheses.
06:26

A common requirement of writing formulas in Excel is to calculate percentages. Examples include to calculate customer discounts, VAT, inflation and salesperson commission.

This lesson covers;

  • Calculating the percentage of a value i.e. 15% of 500.
  • Increasing or decreasing a value by a specific percentage.
  • Calculating the value as a percentage of another value i.e. 70 as a percentage of 500.
  • Finding the value as a percentage increase or decrease of another value i.e. percentage increase of 600 compared to 500.
10:50

A function is a predefined formula in Excel, and Excel contains over 450 of them. Most formulas you write will include the use of functions so you need to be confident in using them.

This lesson includes;

  • Viewing the different categories of function in Excel.
  • Understanding the basic syntax (anatomy) of a function.
  • Using the 5 aggregate functions of Excel (SUM, COUNT, AVERAGE, MAX and MIN).
  • Different approaches to writing a function.
Section 3: Referencing Cells, Sheets and Workbooks in a Formula
03:54

An absolute cell reference is fully locked. When a formula is copied this reference does not change. It is often referred to as a fixed reference, or anchored reference.

This lesson covers;

  • Creating an absolute cell reference by entering dollar signs.
  • Using a keyboard shortcut to make creating absolute references easier.
03:23

A mixed reference is only partially fixed. There are two types of mixed reference; the row absolute and the column absolute.

This lesson covers;

  • Understanding why and when to use mixed references.
  • Applying mixed references y using the dollar sign the fix the required column or row.
06:54

Often your formula will need to reference cells on another sheet or entirely different workbook. You can create these references in the same way that you do when referencing cells on the same sheet.

However, it is a useful skills to be able to write and understand these references for when you use other user's spreadsheets.

This lesson covers;

  • How to reference a cell on a different worksheet.
  • Handling spaces in a sheet name.
  • Referencing cells on a different workbook.
  • Viewing references to other open or closed workbooks.
08:54

The lesson explores the use of Defined Names on a spreadsheet. This practice can simplify the writing and understanding of formulas.

This lesson covers;

  • Advantages to using named ranges.
  • Creating Defined Names and the rules on naming ranges.
  • Using named ranges for navigation of a large workbook.
  • Using named ranges in a formula.
08:55

A range of cells can be converted into a table to make common Excel tasks easier. This technique is best applied to a large list such as a list of sales, employees, inventory or expenses.

What makes formatting a range as a table so useful with formulas, is that they provide dynamic and structured references. This can make formulas much easier to create and control over the long term.

This lesson covers;

  • The benefits of using a range formatted as a table.
  • Creating a table.
  • A demonstration of the tables dynamic nature.
  • How this affects the look of your formulas.
  • Using structured references in your formulas.
Section 4: Using Logical Functions
04:47

Knowing how to use logical functions is a must if you want to be come proficient with formulas in Excel. The main logical function is IF.

This lesson covers;

  • Understanding when and why to use the IF function.
  • Calculating discounts dependent upon a condition.
05:13

An IF function can perform two possible actions upon the result of the logical test. These are known as value if true and value if false. If you need more alternative actions, then you may need more IF's.

This lesson covers;

  • Using 2 IF functions to perform 3 possible actions upon the test result.
  • An understanding of how to structure multiple IF functions.
09:41

An IF function can only perform one logical test, or condition. If you need to perform multiple conditions then you may need the AND or OR function. These are commonly combined with the IF function to perform actions based on multiple conditions.

This lesson covers;

  • Understanding the difference between the AND and OR functions and what they do.
  • The syntax of AND and OR.
  • How to use these functions with IF.
04:46

Formulas will produce error values for many reasons. At times it may be that a value is not available to it yet.

If the error value does not indicate a problem with the formula and require solving, you may wish to perform an alternative action.

This lesson covers;

  • An example of when an error value is not necessarily a bad news.
  • Using the IFERROR function to handle the error value.
Section 5: Formulas for Summing Values
02:53

Create a running total to sum the year to date sales. This cumulative total will add the current months total onto the previous total.

This lesson covers;

  • Create a running total for year to date sales.
  • Using the SUM function with a partially absolute range.
04:19

Often the values to be summed will be dependent upon a specific condition. For example, you may wish to sum the sales totals only for a specific product, or for a specific region.

This lesson covers;

  • Understanding how to use the SUMIF function.
  • Entering text as the criteria for the sum.
  • Using a cell reference as the criteria for the sum.
02:44

You can also perform tests against values in the criteria for the SUMIF function. An example of this could be to sum only the negative values in a range.

This lesson covers;

  • How to enter criteria to test values in SUMIF.
  • When you can omit the last argument of the SUMIF function.
  • Summing only the negative values in a list.
04:56

You can also use a formula to sum values in a list dependent upon multiple conditions. For example you could sum the sales values dependent upon the product and the region sold.

This lesson covers;

  • How to use the SUMIFS function.
  • Use SUMIFS to sum the total expenses for a specific office and expense type.
Section 6: Counting Formulas
01:39

You may need to count the number of blank cells in a range. For this, you can use the COUNTBLANK function. This function will count all the empty cells in a range including empty strings generated by IF or IFERROR functions.

01:49

To count all the non-blank cells in a range, you need COUNTA. This function will count all the cells containing values, text and even logical values (TRUE and FALSE).

06:24

You may need to count the cells in a range that meet a specific condition. The COUNTIF function can be used for this.

This lesson covers;

  • How to use the COUNTIF function.
  • Entering text into the formula for the criteria.
  • Referring to cells as the criteria for the formula.
  • Testing a value for the criteria of the formula.
04:02

To count cells in a range that meet multiple criterion, the COUNTIFS function can be used.

This lesson covers;

  • Using the COUNTIFS function.
  • Creating a COUNTIFS formula to count values dependent upon two conditions.
04:40

You may need to count the unique values in a range, but Excel does not have a function to do this.

This lesson covers;

  • Combining the SUM and COUNTIF functions in a formula to count unique values.
  • A detailed explanation to how this works.
  • Counting the unique entry of names in a list.
Section 7: Calculating Averages
01:43

When people refer to calculating the average, they are normally referring to the mean average. This is calculated by dividing the sum of a range of values by its count.

This process is simplified by using the AVERAGE function in Excel. Blank cells and cells containing text are excluded from the calculation.

03:07

The AVERAGEIF function can be used to calculate the mean average for a range of values that meet a single criterion.

This lesson covers;

  • Understanding the syntax of the AVERAGEIF function.
  • Calculating the average for values that meet specific criteria.
02:52

The AVERAGE function despite excluding blank cells in a range will include any zeros in its calculation. To exclude zeros when calculating an average, the AVERAGEIF function be used.

This lessons covers;

  • An example of zeros affecting an average formula.
  • Using AVERAGEIF to exclude the zeros in a range of values.
03:21

You may need to calculate the average dependent upon multiple conditions.

This lesson covers;

  • Understanding the syntax of the AVERAGEIFS function.
  • Calculating the average of values meeting specific criteria and excluding zeros in a range.
04:14

The value that occurs most often in a range is known as the mode, or modal value. Excel has a MODE function to return the most frequently occurring value in a range.

This lesson covers;

  • How the MODE function works.
  • Using the MODE function to find the modal value in a range.
03:09

The middle value in a range is known as the median. The MEDIAN function can be used to calculate this.

This lesson covers;

  • How the MEDIAN function finds the middle value.
  • The syntax of the MEDIAN function.
02:41

One potential problem when calculating averages are outliers. These are values that are much bigger, or much smaller than the other values in the range.

To prevent these outliers from having an impact on your average calculation, you could use TRIMMEAN.

This lesson covers;

  • An example of when TRIMMEAN could be used.
  • How to use TRIMMEAN.
Section 8: Specialised Functions for Summing and Counting
04:59

The SUBTOTAL function performs subtotals on a list or database. This means you can perform functions such as sum, count and average while ignoring hidden rows.

This lesson covers;

  • Understanding the syntax of the SUBTOTAL function.
  • Using SUBTOTAL to perform functions on a range including hidden rows.
  • Filtering data on a SUBTOTAL list to specify the values to calculate.
04:42

The AGGREGATE function was introduced with Excel 2010 as an enhancement to SUBTOTAL. It can be used to perform aggregates such as sum, count and average, whist ignoring hidden rows or nested subtotals.

The key advantage to AGGREGATE over SUBTOTAL is that it can be used to ignore error values in a range when summing and counting.

This lesson covers;

  • Understanding the syntax of the AGGREGATE function.
  • Using AGGREGATE to sum values whilst ignoring errors in the range.
07:31

The SUMPRODUCT function can be used to perform powerful array calculations. It can be used as an alternative to SUMIFS and COUNTIFS for complex summing and counting tasks.

This lesson covers;

  • Using SUMPRODUCT for complex summing and counting.
  • Using both AND and OR logic in a SUMPRODUCT calculation.
  • Using brackets to stipulate the order of calculation.
06:49

It could be that the values you wish to sum are not in consecutive cells. For example, your list may be structured in a way that you want to sum every other row, or every 5th row.

This lesson covers;

  • Using the SUMPRODUCT function to sum the values from every 5th row.
  • Using the MOD and ROW functions in the 'every nth' row criteria.
Section 9: Working with Text
02:42

Excel provides three useful functions for changing the case of text.

This lesson covers;

  • Using the LOWER function.
  • Using the PROPER function.
  • Using the UPPER function.
03:05

Erroneous spaces at the beginning and end of a text string can be a common cause for data analysis going wrong. Fortunately Excel provides a function to remove the erroneous spaces from cells.

This lesson covers;

  • Understanding the syntax of the TRIM function.
  • Using the TRIM function to remove spaces from the start and end of a string.
04:11

You may wish to join the text from multiple cells into one cell. There are two ways to do this in Excel.

This lesson covers;

  • Joining text (strings) using the CONCATENATE function.
  • Joining text using the ampersand (&).
07:02

Extracting text from a string is a common use of text functions in Excel. This is the first of a few lessons performing various text extraction tasks.

This lesson covers;

  • An example where different parts of a string need to be extracted.
  • Using the LEFT function to extract text from the beginning of a string.
  • Using the RIGHT function to extract text from the end of a string.
  • Using the MID function to extract text from the middle of a string.
  • Nesting the TRIM function within these formulas to remove erroneous spaces before attempting to extract.
10:06

Sometimes you will need to extract text from strings that have good structure and are reliable, and at other times they will be irregular.

This lesson covers;

  • Extracting the first word from a cell.
  • Using the FIND function to determine the length of the word in a cell.
  • Extracting the last word from a cell using RIGHT, FIND and TRIM.
07:50

A string can be different parts that are formed together such as 245-THAJ-013-1, where the hyphens are used to separate each part, however each part also has its own meaning.

This lesson covers;

  • Extracting the characters from the second hyphen in a cell.
  • Using the SUBSTITUTE function with FIND to locate the second hyphen.
  • Using the MID function to perform the extraction.
04:45

Excel does not contain a function to count the number of words in a cell. Tasks such as analysing keyword data entered into search engines could be a reason to count how many words are in a cell.

This lesson covers;

  • A formula to count how many words are in a cell.
  • Combining the LEN, TRIM and SUBSTITUTE function for the task.
Section 10: Date Formulas
03:31

If you are going to be writing formulas to perform calculations on dates, something you will often need to know is what the current date is. With the date changing daily, you need a function to always return the current date.

This lesson covers;

  • Using a function to return the current date.
  • Using a function to return the current date and time.
03:23

There are many reason that you may need to calculate the number of days between two dates. This could be to monitor the length of time between and order being placed and it being dispatched, or the time between an invoice being sent and it being paid.

This lesson covers;

  • How to calculate the number of days between two dates on a worksheet.
  • Possible formatting issues with the formula result.
06:10

It may be that you need to calculate the number of working days between two dates. Possible reasons to do this could be; to track invoice payments are made within a specified number of working days, or to calculate billable days on a task.

This lesson includes;

  • An understanding of the NETWORKDAYS function.
  • Using the NETWORKDAYS function to calculate the days difference excluding weekends.
  • specifying custom non-working days (holidays) to the NETWORKDAYS formula.
  • An explanation of NETWORKDAYS.INTL.
07:24

When calculating the difference between two dates, you may want to return the answer in years, months or both. Typical scenarios for this include calculating someone's age, or an employee's length of service.

This lesson covers;

  • The undocumented DATEDIF function in Excel.
  • Understanding the anatomy of the DATEDIF function.
  • Specifying the interval for DATEDIF to return the answer as years, or in months.
  • Concatenating DATEDIF functions to return the answer as years and months.
04:40

You may need to add months onto a date to calculate a future date. Maybe to view the last date of a contract, or some other expiry date.

This lesson covers;

  • Understanding the EDATE function.
  • Understanding the EOMONTH function.
  • Calculating the last date of a contract.
05:36

Excel contains a function to calculate a date a specified number of working days in the future, or in the past. This lesson looks at calculating a future date.

This lesson covers;

  • Using the WORKDAY function.
  • Calculating the estimated finish date for task in a list using the start date and estimated duration.
04:41

You may have a requirement to identify the day of the week for a specific date. This lesson looks at how to change the colour of all the cells in a list that contains a date which is a Sunday.

This lesson covers;

  • Understanding the syntax of the WEEKDAY function.
  • Customising the first day of the week in the WEEKDAY function.
  • Writing a formula in a Conditional Formatting rule to apply a fill colour to the Sundays in a list of dates.
04:25

The DATE function can be used to convert data on a spreadsheet into a date format. It is also useful for entering dates into other formulas such as IF.

This lesson covers;

  • Understanding the syntax of the DATE function.
  • Converting data in the format of 20150320 that you can receive in file names of photos and videos into a date.
  • Using the LEFT, MID and RIGHT text functions to extract data.
Section 11: Time Formulas
02:04

If you are using an Excel spreadsheet to record times, a common requirement may be to calculate the difference between the two times.

This lesson covers;

  • Calculating the hours worked in a shift on a timesheet.
  • Possible format issues when working with times.
02:15

This lesson looks at calculating the difference between times on two different dates. This can create some problems if the date is not recorded in the same cell as the time.

This lesson covers;

  • A neat formula to calculate the time difference for times on different dates.
  • Calculating the hours for night shifts on a timesheet.
02:23

You can sum times in Excel just you sum any other values. However you can encounter a problem when summing times that exceed 24 hours.

This lesson covers;

  • Summing the total hours worked for a week on a timesheet.
  • What format to apply to display the correct result for totals exceeding 24 hours.
03:43

You might have cells on a spreadsheet that contain a number of hours or minutes stored in decimal form. For example; 9.25 hours, or 400 minutes. These can be converted to a time format for easier reading and further analysis.

This lesson covers;

  • How to convert decimal hours into a time format.
  • How to convert decimal minutes into a time format.
Section 12: Lookup Formulas
09:25

The VLOOKUP function is the most commonly used lookup function of Excel. This vertical lookup is used to look for and return a value from a table.

This lesson covers;

  • What is VLOOKUP?
  • How to write a VLOOKUP function.
  • Using VLOOKUP for an exact match lookup on a value.
06:08

The VLOOKUP function can also be used to look for a value in a range and use the closest match.

This lesson covers;

  • How to perform a closest match VLOOKUP.
  • An example for why you would want to use closest match instead of exact match.
  • What to be wary of when performing a closest match.
03:32

The HLOOKUP function works in the same way as VLOOKUP apart from it looks horizontally along a row for the lookup value.

This lesson covers;

  • The syntax of the HLOOKUP function.
  • How to write a HLOOKUP for an exact match.
06:28

Create a lookup formula that can lookup information down a column and across a row. This two way lookup can be created by combining the powers of the VLOOKUP and MATCH functions.

This lesson covers;

  • An explanation of the MATCH function.
  • The benefits of using MATCH with VLOOKUP to create a dynamic and durable column index number.
  • Writing a two way lookup formula to return information from a list.
08:35

By using the INDEX and MATCH functions together you can create a very versatile lookup formula. These two functions complement each other nicely and provide a nice alternative to VLOOKUP.

This lesson covers;

  • The benefits of using the INDEX and MATCH functions as an alternative to VLOOKUP.
  • An introduction to the INDEX function.
  • Creating an INDEX and MATCH lookup formula.
  • Nesting two MATCH functions for a dynamic two way lookup.
05:37

Lookup formulas such as VLOOKUP, HLOOKUP and MATCH return the #N/A error when they cannot find a match for the lookup value. This error message is ugly and can cause problems with other formulas on your spreadsheet.

This lesson covers;

  • An example of the #N/A error being generated.
  • How to hide the #N/A error using the IFERROR function.
Section 13: Advanced Lookup Formulas
06:25

This lesson looks at how to create a lookup that is based on the values in two columns. The same technique can be used for lookups based on multiple columns.

This lesson covers;

  • Using the INDEX and MATCH functions for a two column lookup.
  • Using arrays to create multiple conditions in the MATCH function.


07:32

You can use a lookup formula to return the address of a cell instead of its value. You would usually be doing this to feed another function with the address.

This lesson covers;

  • How to create a lookup formula to return the cell address of a value.
  • Using the ADDRESS function with MATCH.
  • How to return different types of cell address, and include the sheet reference in a result.
06:06

Lookup functions such as VLOOKUP and MATCH are not case sensitive. This lesson looks at how you can create a case sensitive lookup formula.

This lesson covers;

  • Understanding the EXACT function and how to use it.
  • Using the EXACT function with INDEX and MATCH for a case sensitive lookup.
05:11

Lookup formulas are typically used to return values. This lesson looks at how to create a lookup formula to return a picture from a list.

This lesson includes;

  • Steps to setting up your list of pictures.
  • Create a picture lookup using a formula in a defined name.
  • Linking a picture to the lookup formula.
06:28

You may have multiple lookup tables for a VLOOKUP, and want the required lookup table to be selected by a user.

This lesson includes;

  • Using the INDIRECT function with VLOOKUP to reference the required lookup table.
  • Using defined names for the lookup tables.
  • Creating sheet references in the VLOOKUP formula for tables on different sheets.
03:25

Creating lists to assist data entry is a common technique in Excel. If your list is large, you may want to break it into multiple dependent lists.

This lesson covers;

  • How to set up the lists you want to use.
  • Using the INDIRECT function in Data Validation to create the list dependency.
07:49

The HYPERLINK function is used to create hyperlinks to other cells, files or webpages. It's brilliance is evident when used with other functions such as IF and VLOOKUP for conditional hyperlinks.

This lesson covers;

  • Understanding the syntax of the HYPERLINK function.
  • Building a hyperlink using the content from cells on the spreadsheet.
  • Combining the HYPERLINK function with IF for a conditional hyperlink.
Section 14: Solving Formula Errors
Article

Not all formulas will return an error message when there is a problem. Some problems will work but return the wrong answer because they are written correctly, but the logic is wrong. These can be harder to diagnose.

Fortunately Excel displays an error message whenever there is a problem with the way a formula is written.

This lesson covers;

  • A list of the common formula error messages.
  • An explanation to what they mean and what may have caused them.
Article

This lesson looks at some common formula problems and how they can be identified and resolved.

The lesson includes;

  • Common mistakes when writing formulas that generate errors or incorrect results.
  • Problems that can be caused by mistakes made on cells being used by the formula.
  • Ways of troubleshooting and possible resolutions to these problems.
08:35

No matter how good are you are at writing formulas, if mistakes have been made when entering data onto the worksheet your formulas may stop working.

Excel has a feature called Data Validation that can be used to try and prevent mistakes such as typos and spelling errors on data entry into cells.

This lesson covers;

  • Creating a list to assist and validate text entries.
  • Validating the entry of values.
  • Creating your own error alert for warning the user of invalid data.
04:17

Not all formula error messages will indicate a problem. The formula may be fine, but the data it uses may not be available to it yet. This is quite typical with lookup formulas and formulas that divide values, but is not limited to those.

This lesson covers;

  • An example of a harmless error message produced by a formula.
  • Hiding the error message using the IFERROR function.
06:45

Protecting the formulas on a worksheet is a good idea to protect them against accidental damage.

This lesson covers;

  • Locking and unlocking the cells of a worksheet.
  • A clever trick to select all the cells containing formulas on a worksheet.
  • Applying worksheet protection.
02:39

When troubleshooting formulas, it may be helpful if they were all visible on the worksheet. By viewing the formulas on a worksheet, the formula text is shown instead of its result.

This lesson covers how to view the formulas on a worksheet and also to hide them again when finished.

06:31

When trying to diagnose the problem with a formula, it can help if you understand its relationship with the other cells of the worksheet. Excel provides a formula auditing tool to visualise these links between cells to make them easier to understand.

This lesson covers;

  • How tracing precedents and dependents can help you diagnose formula problems.
  • Solving two formula problems on a worksheet diagnosed by tracing precedents.
06:22

The Evaluate Formula tool is Excel's main tool for debugging large and complex formulas. It enables you to step through a formula, evaluating each part individually to identify the cause of the problem.

This lesson covers;

  • How to use the Evaluate Formula tool.
  • Using Evaluate Formula to understand a complex formula and its order of calculation.
06:14

When working with formulas in Excel, you have probably come across a circular reference error. These are normally encountered after making a simple mistake and can easily be corrected.

This lesson covers;

  • What is a circular reference?
  • How to find the circular references on a worksheet.
  • Common causes and fixes for circular reference errors.

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Instructor Biography

Alan Murray, Founder of Computergaga

Alan Murray is a Microsoft Office trainer and consultant. He has been training and consulting for the past 15 years for businesses around the world.

He is the founder of Computergaga and regularly writes on the Computergaga blog to share tips, tutorials and templates.

Alan uses a fun and relaxed style of training that gets to the point, and uses real world practical examples uncovered from his experience of training and developing software for businesses.

Files are provided to follow along and exercises used to recap on topics covered. Alan is always eager to help and will be there for you when needed. He will do his best to answer any question or query related to his courses within 48 hours.

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