Can some one explain me about while loop

Answer 1

In Python, While Loops is used to execute a block of statements repeatedly until 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

https://www.geeksforgeeks.org/python-while-loop/

Answer 2

See lesson 25.1 in the Python for Beginners course that you are doing.

Answer 3

It's like an alarm clock. If you forget to set it, you never wake up....