How to determine integer in python

Python method to determine integers: 1. You can use the is digit method of string str to determine whether the string is composed of only digits; 2. You can use the [try-except] statement to capture ValueError and continue the request enter.

The operating environment of this tutorial: Windows 7 system, python version 3.9, DELL G3 computer.

Python method to determine integers:

1. You can use the is digit method of string str to determine whether the string is composed of only digits, or It's an integer. If it is an integer, exit the while loop, otherwise continue to request input.

while True: x = input('Input an integer: ') if x.isdigit(): break else: print 'Please input an *integer*'

2. You can also use thetry-exceptstatement. If the input string is an integer, then it can be converted to the int class using the int() function and exit the loop. Otherwise, a ValueError will occur. You can use the try-except statement to capture the ValueError and then continue to request input.

while True: try: x = input('Input an integer: ') x = int(x) break except ValueError: print 'Please input an *integer*'

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