Decision statement problems

[woooee]

You want to do something when it is not a digit

def is_it_digit(inptUser):
    for x in inptUser:
        if not x.isdigit():
            print('a not digit found')
            return False
    print(' The input is full of digits ')
    return True

inptUser = input('Please enter a variable : ')
print(inptUser)
print(is_it_digit(inptUser)) 

And when you have some time, take a look at the Python Style Guide; variables are lower_case_with_underscores
https://www.python.org/dev/peps/pep-0008/