Python loops

The Python while-else Clause

The Python while-else clause is an additional, optional syntax Python's while loop supports, similar to the else clause in the for loop. It enables you to execute a code block after the loop has finished normally, that is, after the while loop's condition has become false. Abnormal, premature termination, due to reasons such as a break or return statement, skips that code.

Emulating do-while Loops in Python

A do-while loop ensures code executes at least once, checking the termination condition at the end. Although Python lacks a native do-while loop, it can be emulated using a 'while True' loop with a 'break' statement when a certain condition is met.

The Python continue Statement

The Python continue statement is used to skip the remaining code in the current loop iteration and proceed to the next one. It can be used with both the for and while loops. In nested loops, continue only impacts the innermost loop.

The Python break Statement

The Python break statement allows you to prematurely exit a loop before its natural completion. This statement is handy when you want to stop a loop's execution for a condition that is not convenient to check under the loop's normal syntax. It can be used with both the for and while loops. While useful in for loops with a specific end condition, it's crucial for while loops where the end condition isn't predetermined. In nested loops, break only exits the innermost loop, which can cause errors if not managed correctly.

The Python while Loop

The Python while loop allows for the repetition of a code block based on a specified condition. It uses the syntax "while condition:" followed by a code block to execute as long as the condition is true. It's possible to create an infinite loop that can be terminated using the "break" statement.