In this tutorial, you’ll learn about indefinite iteration using the Python while loop. You’ll be able to construct basic and complex while loops, interrupt loop execution with break and continue, use the else clause with a while loop, and deal with infinite loops.

Iteration means executing the same block of code over and over, potentially many times. A programming structure that implements iteration is called a loop.

In programming, there are two types of iteration, indefinite and definite:

• With indefinite iteration, the number of times the loop is executed isn’t specified explicitly in advance. Rather, the designated block is executed repeatedly as long as some condition is met.
• With definite iteration, the number of times the designated block will be executed is specified explicitly at the time the loop starts.

In this tutorial, you’ll:

• Learn about the while loop, the Python control structure used for indefinite iteration
• See how to break out of a loop or loop iteration prematurely
• Explore infinite loops

When you’re finished, you should have a good grasp of how to use indefinite iteration in Python.

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