Write an expression that executes the loop body as long as the user enters a non-negative number.
Note: These activities may test code with different test values. This activity will perform three tests, with user_num initially 9 and user input of 5, 2, -1, then with user_num initially 0 and user input of -17, then with user_num initially -1. See How to Use zyBooks.
Also note: If the submitted code has an infinite loop, the system will stop running the code after a few seconds, and report "Program end never reached." The system doesn't print the test case that caused the reported message.

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user_num = 9;

while (user_num <= 9):

print('Body')

user_num = int(input())

print('Done.')

***Must be in pyhton****