while_loop.py

square = 1

while square <= 9:
    print(square)    # This code is executed 10 times
    square += 1      # This code is executed 10 times

print("Finished")  # This code is executed once

square = 1
number = 1

while number <= 9:   # Print all squares from 0 to 99 (1, 4, ... , 81).

    square = number ** 2
    print(square)
    number = number+1

산출물 (Output)

1
2
3
4
5
6
7
8
9
Finished
1
4
9
16
25
36
49
64
81

* A "while" loop is similar to an "if" statement: it executes some code if some condition is true.
The key difference is that it will continue to execute indented code for as long as the condition is true.