REGEX for whole, positive number

Question

I am trying to create an input regex that will only accept whole, positive numbers. So far I have:

[^[+]?\d+([.]\d+)?$]

But users can still enter, say, .4. How can I alter this to disallow floats? Thanks!

but your current regex `\d+([.]\d+)?` allows floats , actually — RomanPerekhrest, Feb 23 '17 at 11:49
Are you wanting to disallow floats altogether, or accept whole positive numbers eg 123.00 ? — Gavin Jackson, Feb 23 '17 at 12:01
yes, I would like to disallow floats altogether. So 123 would be accepted but 123.00 would not. The input field is for a number of people, so it would be odd for someone to enter in 123.00 — Ron, Feb 23 '17 at 13:13

score 1 · Answer 1 · answered Feb 23 '17 at 12:20

1

This allows only positive numbers

^[0-9]+$

answered Feb 23 '17 at 12:20

tak3shi

This helped me! Would have even more been helpful if it explained why. – Sneha Valabailu Sep 29 '22 at 11:17

score 1 · Answer 2 · edited May 23 '17 at 11:46

1

I think you try to filter only positive integers.

^[1-9]\d*$

allows only positive integer numbers. What is the regex for "Any positive integer, excluding 0" will also help you.

edited May 23 '17 at 11:46

Community

answered Feb 23 '17 at 12:30

javasenior

score -1 · Answer 3 · answered Feb 23 '17 at 12:14

-1

Use only ^[+]?\d+$

you can see the test cases here

answered Feb 23 '17 at 12:14

Abdul Hameed

3 Answers3