Python - How to add an input error message

Question

In Python, I have code where I only want the input to be a number and I want there to be an error message if the user inputs a string(words). How do I do that?

Do you want to prompt the user to try again if they give bad input? — PM 2Ring, Sep 19 '18 at 23:56
Ok. Kevin's answer in the linked question shows you exactly how to do that. ;) — PM 2Ring, Sep 20 '18 at 00:10
It would be great if you append a code stub of what you did for solving your question. With a sample code, your question will be viewed by more users. — Hamid Rouhani, Sep 20 '18 at 00:19

score 1 · Accepted Answer · answered Sep 19 '18 at 23:59

1

use try and except

userInp = input("YOUR QUESTIONS")
try:
    float(userInp)
except ValueError:
    print("YOUR ERROR")

answered Sep 19 '18 at 23:59

score 0 · Answer 2 · answered Sep 19 '18 at 23:57

0

You can have the input inside a while loop. In the loop you can check the type of the input (make sure to assign it to a variable). Have a condition that exits the loop when the input is a number and give an error message when it is not

answered Sep 19 '18 at 23:57

markb

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Python - How to add an input error message

2 Answers2