Скачать или смотреть 08 - While Loop in Python || Python Tutorial for Beginners

In Python, While Loops is used to repeatedly execute a block of statements, a given condition is satisfied. And when the condition becomes false, the line immediately after the loop in the program is executed. While loop falls under the category of indefinite iteration. Indefinite iteration means that the number of times the loop is executed isn’t specified explicitly in advance.

Python uses indentation as its method of grouping statements. When a while loop is executed, expression is first evaluated in a Boolean context and if it is true, the loop body is executed. Then the expression is checked again, if it is still true then the body is executed again and this continues until the expression becomes false.