Python Fundamentals: Using While Loops with Composite Data Types

Python’s while loop is introduced as a basic control‑flow tool for repeating actions, especially when working with composite data types.

The loop consists of three parts:

Initial condition – executed only before the first iteration.

Loop body – the statements run while the condition holds.

Update condition – typically modifies variables to eventually break the loop.

Key notes for Python:

The initial condition runs only once; it is not re‑evaluated on each pass.

Python does not support ++ or -- increment operators.

There is no native do‑while construct.

Example code demonstrates printing "hello world" ten times using a while loop:

num = 0</code><code>while num < 10:</code><code>    print("hello world")</code><code>    num += 1

The output consists of ten consecutive "hello world" lines, confirming the loop’s correct operation.