Revision Guide: Flow of Control

The order of execution of statements in a program, governed by control structures.

Control structures in Python include 'selection' (if, else) and 'repetition' (for, while).

In Python, indentation defines code blocks; incorrect indentation leads to syntax errors.

Syntax: if condition: statements. Executes if the condition is True.

Else provides an alternative path. Elif allows testing multiple conditions in succession.

if age >= 18: print('Eligible to vote') else: print('Not eligible to vote').

For loops iterate over a sequence, executing a block for each item in the sequence.

While loops execute a block while a certain condition is True, checked before each iteration.

Exit the current loop immediately when a specific condition is met, continuing after the loop.

Skip the rest of the loop for the current iteration when a condition is met, resume with the next iteration.

A loop that runs inside another loop, allowing complex repetitive tasks to be handled.

range(start, stop, step) generates a series of numbers. Useful in for loops.

Use nested loops to print shapes like triangles or squares based on user input.

An infinite loop occurs when the loop's condition never evaluates to False.

Demonstrates selection structure for basic arithmetic operations based on user input.

Use if, elif, else to create decision points that dynamically alter program flow.

Loops can be used to continuously gather user input until valid data is provided.

Like decision-making in daily life (choose the shortest route), programming uses control flow similarly.

Visual representation of flow control aids in understanding logical sequence and structure of programs.

Conditions can be combined using logical operators (and, or) to test multiple criteria simultaneously.

Engaging in programming exercises related to flow control enhances understanding and retention.