I there any way to validate a number had been entered into an input?

Question

print("Now please enter a number")
No1 = int(input(">> "))

Is there any way that I could validate that the user had entered a number using a while loop and variables for example:

NumberInput1 = False

print("Now please enter a number")
while NumberInput = False
    No1 = int(input(">> "))
    #if a number was entered
    NumberInput1 = True
    #if a number wasn't entered
    NumberInput1 = False
    print("That is not a number try again")

Possible duplicate of [How can I type-check variables in Python?](http://stackoverflow.com/questions/463604/how-can-i-type-check-variables-in-python) — rll, Dec 10 '15 at 19:31

score 1 · Answer 1 · answered Dec 10 '15 at 19:25

1

You can use try/except to distinguish whether your string is convertible to an integer.

gotNumber = False
while not gotNumber:
    try:
        num = int(input('>> '))
        gotNumber = True
    except ValueError:
        print("That is not a number.")

answered Dec 10 '15 at 19:25

khelwood

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Cool. There should be a button somewhere around here for you to accept the answer. – khelwood Dec 10 '15 at 19:40

I there any way to validate a number had been entered into an input?

1 Answers1