Python for Complete Beginners

Explore how to work with variables in Python by assigning values without prior declaration. See how variables change value and type during execution, and print results like 100 and 101.

Explore how a variable's type can change during execution, using assignments to integer, float, and string, and verify types with the type function and print statements.

Learn how to assign values to Python variables using the equals sign, supporting strings, integers, and floats; explore single and multiple assignments and printing results.

Explore how Python interprets numbers and uses the interpreter as a calculator, showing integers and floats. Learn about variables, power operations, and basic error handling in the interpreter and IDE.

Learn how Python converts numbers between integer, float, and complex types through explicit type casting, using float() and int(), and observe how types and values update during conversion.

Explore how strings in Python are enclosed in single or double quotes, and how to access characters using zero-based and negative indexing, demonstrated through city and letters examples.

Explore how to concatenate and repeat strings in Python using the plus sign and the star operator, with hands-on examples such as building a full name and repeating text.

Master string slicing in Python by selecting a start index inclusive and an end index exclusive, with examples from 'programming' and ranges like 0 to 2.

Learn how to update a string by slicing from index six and concatenating a new value, turning 'Hello Python' into 'Hello John'.

Explore Python escape characters, including backslash, newline, tab, and vertical tab, and see how they behave in single and double quoted strings. Practical examples show how to print these sequences.

Discover Python string operators, including concatenation with plus, slice and range slice, repetition with asterisk, and membership tests with in and not in, plus future modulo-based formatting.

Explore string formatting in Python using the modulo operator, employing %s for strings and %i for integers, with a live example and note the Python 2 to 3 shift.

Learn how Python lists are mutable, sequences defined by square brackets with zero-based indices, enabling indexing, slicing, adding, membership checks, and length and min/max on numbers, strings, and nested lists.

Learn to access list values in Python using indices and slices. Apply zero-based and negative indices and grasp start-inclusive, end-exclusive slicing with city and number examples.

Learn how to update a list element by index in Python, replacing the third city with Delhi and printing the original, updated, and full list to verify the change.

Learn to delete a value from a list in Python using del for a known index or remove for unknown element, shown with a cities list before and after deletion.

Explore Python's five basic list operations—concatenation, repetition, length, membership, and iteration—through a real-world city list example, using for loops and membership checks to print elements.

Explore how Python tuples are immutable, how to create them with parentheses, and how to access elements by index using slicing from zero to the last excluded.

Learn that tuples are immutable in Python, so you cannot update or delete individual elements; instead, create a new tuple by concatenation or delete the tuple with del.

Learn basic tuple operations in Python, including iteration with a for loop, repetition, length with len, concatenation, and membership tests using in and not in.

Learn to use max and min in Python to find the largest and smallest values in a tuple, illustrated with print statements showing 120, 12, 1, and 900.

Learn Python sets as unordered collections with no duplicates, perform membership tests and operations like union, intersection, difference, and symmetric difference, using braces or set().

Explore Python dictionaries, a keys–values data type with curly braces and unique, immutable keys. Create, update, access, and delete entries, and view keys and values with dict methods.

Master Python decision making by using the if statement syntax with test expressions, and learn how elif and else control code blocks, including indentation and always-executed code.

Master the else statement syntax in Python, where the else block runs when the if condition is false, with an example printing a positive number or a negative number.

Explore Python if, elif, and else syntax with practical examples that demonstrate multi-branch decision making, including comparisons like greater than ten and equal to ten.

Master for loops in Python to iterate over sequences and iterables like lists, sets, dictionaries, and strings. Sum elements and print during iteration, then observe the value after the loop.

Discover how the Python range function generates number sequences and works with for loops to access values. Learn range syntax with start, stop, and step, including defaults and examples.

Learn how the while loop repeats a code block until the test expression is true, with a practical example that sums numbers from one to ten to 55.