What does while mean in python

In Python programming, the while statement is used to execute a program in a loop, that is, under certain conditions, execute a certain program in a loop to handle the same task that needs to be processed repeatedly. Its basic form is:

while Judgment statement:

Execution statement...

For example

a = 1
while a <= 10:
    print(a)
    a += 2

Output result

1
3
5
7
9

The meaning of this code is: the initial value of a is 1, and the judgment condition is: if a <10, then print a, Then add 2 to the returned a. If a<10, the program will be executed forever; if a is not less than 10, the program will be terminated. Obviously, the value of a returned for the fifth time is 9, 9 plus 2 equals 11, 11 is not less than 10, and the program terminates.

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