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Python Comparison Solution

Posted by Michael Aguilar
Michael Aguilar
3,866 Points

what if I enter a number when asked for a name? and vice versa?

What if I do this:

"what is your name? :" and I enter '45'

how can I show a message asking the user to enter a valid form of input, in this case, the answer in the format of letters only?

1 Answer

Maxwell Newberry
Maxwell Newberry
7,693 Points
Maxwell Newberry
Maxwell Newberry
7,693 Points

You can use a lesson we learned regarding Try and except ValueError. We know that the default variable type when we receive a prompt is string. So what we can do is take in that string, then try to convert it to an integer. If it contains a period (.) we can check it for a float as well. If the input does not properly convert, we will raise a ValueError exception and know that it is in fact a string and non-numeric.

user_input = input ("Enter input value")
try:
   if "." in user_input :
     val = float(user_input)
     print(val, "Yes, user input is a float number.")
   else:
      val = int(user_input)
      print(val, "Yes, input string is an Integer.")
except ValueError:
   print("No.. the input string is not a number. It's a string")

The issue with this method is that you cannot check whether the input is Maxwell45, because that will return that it is a string.

Michael Aguilar
Michael Aguilar
3,866 Points

I realized I was getting ahead of myself lol. The following videos touched on the question I had. Still, your answer helps understanding it even more, thank you!