Validating user input

[WJSwan]

I am new to Python and do not know how to do the following:

I have an input statement asking the user to enter 4 values. I then validate these values and if anyone fails the validation, I need the user to re-enter the values.

What construct can I use to do this (since Python does not have a goto!)?

[DPaul]

Without code, it is difficult to see what kind of validation you need.
Paul

[menator01]

Basic example might be like this:

while True:
    name = input('a name: ')
    if name == 'John':
        print('true')
        break
    else:
        print('False')
        continue

Output:
a name: bob
Incorrect. Try again.
a name: John 
true