# Verify if is a number

**URL:** <https://forum.kirupa.com/t/verify-if-is-a-number/280309>\
**Category:** Uncategorized\
**Created:** [January 26, 2009, 2:52am UTC](https://forum.kirupa.com/t/verify-if-is-a-number/280309 "2009-01-26T02:52:01Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![ruiganga](https://yyz1.discourse-cdn.com/flex011/user_avatar/forum.kirupa.com/ruiganga/32/3679_2.png) [@ruiganga](https://forum.kirupa.com/u/ruiganga)\
**Post date:** [January 26, 2009, 2:52am UTC](https://forum.kirupa.com/t/verify-if-is-a-number/280309/1 "2009-01-26T02:52:01Z")

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hi

I have a textfield. I want to verify if the content inserted by the use is a number, and if it is not I want to give a message.

How can I verify if it is a number?

Thanks