A simple program to accept only numbers

Question

I'm writing a simple program to accept only numbers. but the program is accepting both letters and numbers

I'm using python 3.. I used the int data type in addition to input statement.

#A program to accept input of a number
print('Welcome to our age verification system.')
int(input('Enter your age: '))

I expected it to accept only integers.

score 1 · Answer 1 · answered Jul 27 '19 at 18:31

You can judge your input is a digit first.

#A program to accept input of a number
print('Welcome to our age verification system.')
input_string = input('Enter your age: ')
if input_string.isdigit():
    print(int(input_string))
else:
    print("please input a number")

ShiSHcat · Answer 2 · 2019-07-27T18:36:40.153

0

Is a duplicate of this question

try:
    int(input('Enter your age: '))
except ValueError:
    print('This isn\'t a number');

edited Jul 27 '19 at 18:36

answered Jul 27 '19 at 18:30

ShiSHcat

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1

If it's a duplicate, just mark it as a duplicate. – bereal Jul 27 '19 at 18:34
I think you should escape the single quote. In the print statement: `print('This isn\'t a number');` – Omar Jul 27 '19 at 18:35

A simple program to accept only numbers

2 Answers2