Python Programming for Complete Beginners

Learn how to create and use variables in Python by assigning integers, performing x plus y to get z, and printing results, with comments guiding the practice.

Learn how to name variables in Python with snake_case and CamelCase, create unassigned variables, assign values later, and print strings and numbers to pass tests.

Learn how to get user input in Python with input(), prompt the user, assign to a variable, and print the value to confirm it works, as shown using Replit.

Learn how to swap two variables in Python without losing data, using a third variable, and understand why simple sequential assignment fails.

Learn how to swap two integers using a temporary variable by copying int one to temp, moving int two into int one, and then restoring int two from temp.

Explore Python math and assignment operators, including +, -, *, /, //, %, and **, and learn how int and float types affect results and how to update values with +=, -=, *=, and /=.

Apply math operators in Python to calculate a rectangle's area and perimeter using length 20 and width 10, with variables, formulas, hints, and solution walkthrough.

Explains the rectangle coding exercise, deriving area as length times width and correcting the perimeter formula using parentheses to follow the order of operations.

Master comparison operators in Python, returning true or false for ==, !=, >, <, and >=. Explore how integers, floats, and strings compare, including type errors and alphabetical order.

Explore how to print quotes in Python strings using single or double quotes, and preview how escape sequences let you include special characters.

Concatenate strings using the plus operator and plus-equals shorthand to build phrases. Convert integers to strings when concatenating, and practice forming sentences from a string and an integer.

Explore python string methods and predicates like is lower, is upper, is alpha, is digit, is alnum, and startswith. Learn transform lower, upper, capitalize, title, strip, find, replace, and count.

Discover how Python f-strings replace concatenation by embedding variables, apply formatting options for alignment, width, and padding, and display numbers in decimal, percent, binary, octal, and hexadecimal.

Learn how to use if statements, elif, and else in python. Understand conditions, true/false values, and indentation to control which code runs based on comparisons like five equals five.

Explore truthiness in Python by showing how values are treated as true or false in if statements, including numbers and nonempty strings versus zero, empty strings, and none.

Explore how while loops use conditions to repeat actions, avoid infinite loops, and control flow with break, continue, and counter updates, including odd/even checks and simple iterators.

Explore for loops in Python by comparing them to while loops, using range(start, stop, step) to control start, stop, and step; learn iterator naming and how to print sequences.

Discover the solution to the for loops range-based exercise by changing start to five and stepping by negative one, stopping before zero to print 54321.

Demonstrate how nested for loops use two variables to print paired values, show inner-outer loop flow, and compare for loops to while loops.

Use for loops to iterate over strings and lists, printing each item. Learn the in keyword and the naming convention for plural collections and singular loop variables.

Explain the difference between while loops and range-based for loops, using pseudocode and linked lists to show while depends on a condition and for runs a known number of iterations.

Learn to define and use functions to reuse code, avoid duplicating lines, and update changes in one place by calling a named function with parameters.

Create two rectangle functions that return the area and perimeter, with a default width of ten; use calls area(length, width) and perimeter(length, width).

Define rectangle functions to compute area and perimeter with length and width, set a default width of ten, and return length times width for the area.

Explore how Python handles variable scope by contrasting global variables, local function scope, and the lack of block scope, with examples showing access inside if statements and loops.

Learn lists as versatile data structures and master indexing and slicing, including negative indices and nested lists, while seeing how lists differ from strings and access inner elements.

Learn how to modify elements in lists, using append, insert, extend, remove, pop, delete, and sort, and compare list behavior with strings' indexing.

Convert a list to a set to remove duplicates and learn that sets have no indexes. Compare sets via union and intersection, and use update, discard, and clear for manipulation.

Explore tuples in Python as immutable containers that hold duplicates and various data types. Learn packing and unpacking, index and count methods, and how tuples enable nested data and coordinates.

Explore Python dictionaries: create key-value pairs in curly braces, look up by key with get, handle missing keys, update, remove, and work with keys, values, and nested dictionaries.

Practice solving coding challenges by implementing a function even_or_odd using modulo two to return 'even' or 'odd' for a given number, with multiple return statements and function signature considerations.

Explore the max of two by implementing a maximum function with two parameters a and b, using a comparison operator to return the greater value (for example 10 and 20).

Use a loop to sum numbers in a list (dynamic array) and return the total via sum_list, as in 10, 20, 30, 40, 50 totaling 150.

Learn to implement a repeat word function with word and count parameters, returning the word repeated count times. Compare looping and string multiplication to solve the task.

Learn to count occurrences of the lowercase a in a text by looping through a string, using an if statement to increment a counter, and returning the result.

Learn to sum digits in a string by looping over characters, converting each to an integer, and adding them in Python, assuming the input contains only numbers.

Learn to count evens by iterating over a list of numbers, checking each number to see if it is even, and returning the total count as an integer.