# Guide for checking if text is number **URL:** \ **Category:** Tutorials and DIY Guides\ **Tags:** community, math, text, tips\ **Created:** [November 18, 2020, 5:37am UTC](https://community.thunkable.com/t/guide-for-checking-if-text-is-number/981590 "2020-11-18T05:37:48Z")\ **Posts on this page:** 17\ **Page:** 1
**Author:** ![luv.ak.tech](https://sea1.discourse-cdn.com/flex015/user_avatar/community.thunkable.com/luv.ak.tech/32/104896_2.png) [@luv.ak.tech](https://community.thunkable.com/u/luv.ak.tech)\ **Post date:** [November 18, 2020, 5:37am UTC](https://community.thunkable.com/t/guide-for-checking-if-text-is-number/981590/1 "2020-11-18T05:37:48Z")
### A guide to check if it is number or not ### Try This- ![image](https://us1.discourse-cdn.com/flex015/uploads/thunkable/original/3X/3/9/39888e8ddc905bfbd3c703d926aeca873e5a7163.png) ### Now working with no error! ---
**Author:** ![luv.ak.tech](https://sea1.discourse-cdn.com/flex015/user_avatar/community.thunkable.com/luv.ak.tech/32/104896_2.png) [@luv.ak.tech](https://community.thunkable.com/u/luv.ak.tech)\ **Post date:** [November 18, 2020, 5:39am UTC](https://community.thunkable.com/t/guide-for-checking-if-text-is-number/981590/2 "2020-11-18T05:39:41Z")
please tell if this guide was helpful! ---
**Author:** ![eko.devs.apploroceo](https://sea1.discourse-cdn.com/flex015/user_avatar/community.thunkable.com/eko.devs.apploroceo/32/93147_2.png) [@eko.devs.apploroceo](https://community.thunkable.com/u/eko.devs.apploroceo)\ **Post date:** [November 18, 2020, 6:07am UTC](https://community.thunkable.com/t/guide-for-checking-if-text-is-number/981590/4 "2020-11-18T06:07:56Z")
very helpful take this 🎉 i guess the topic name isnot suitable ---
**Author:** ![luv.ak.tech](https://sea1.discourse-cdn.com/flex015/user_avatar/community.thunkable.com/luv.ak.tech/32/104896_2.png) [@luv.ak.tech](https://community.thunkable.com/u/luv.ak.tech)\ **Post date:** [November 18, 2020, 6:16am UTC](https://community.thunkable.com/t/guide-for-checking-if-text-is-number/981590/5 "2020-11-18T06:16:18Z")
thank you for comment @eko.devs.apploroceo ---
**Author:** ![tatiang](https://sea1.discourse-cdn.com/flex015/user_avatar/community.thunkable.com/tatiang/32/55482_2.png) [@tatiang](https://community.thunkable.com/u/tatiang)\ **Post date:** [November 18, 2020, 6:38am UTC](https://community.thunkable.com/t/guide-for-checking-if-text-is-number/981590/6 "2020-11-18T06:38:58Z")
Interesting approach. Here’s what I’d do to determine if a value is a number: ![Screen Shot 2020-11-17 at 10.38.28 PM](https://us1.discourse-cdn.com/flex015/uploads/thunkable/original/3X/6/a/6a01aa9c8156a136993affafadf69de095021706.png) If you multiply a text string by zero you’ll get NaN or possibly null. If you multiply any number by zero, you’ll get zero. ---
**Author:** ![luv.ak.tech](https://sea1.discourse-cdn.com/flex015/user_avatar/community.thunkable.com/luv.ak.tech/32/104896_2.png) [@luv.ak.tech](https://community.thunkable.com/u/luv.ak.tech)\ **Post date:** [November 18, 2020, 6:42am UTC](https://community.thunkable.com/t/guide-for-checking-if-text-is-number/981590/7 "2020-11-18T06:42:30Z")
this is also a good way to check if is number in less blocks nice @tatiang ---
**Author:** ![tatiang](https://sea1.discourse-cdn.com/flex015/user_avatar/community.thunkable.com/tatiang/32/55482_2.png) [@tatiang](https://community.thunkable.com/u/tatiang)\ **Post date:** [November 18, 2020, 7:07am UTC](https://community.thunkable.com/t/guide-for-checking-if-text-is-number/981590/8 "2020-11-18T07:07:22Z")
Thanks. One drawback of your approach is that I’m pretty sure if the last character in the text string is a number, it will evaluate the entire string as a number. So these would all be numbers: 4 29 heythere29 M8 You’d need a variable that counts the number of found numeric digits/characters and then compares that to the length of the string. ---
**Author:** ![luv.ak.tech](https://sea1.discourse-cdn.com/flex015/user_avatar/community.thunkable.com/luv.ak.tech/32/104896_2.png) [@luv.ak.tech](https://community.thunkable.com/u/luv.ak.tech)\ **Post date:** [November 18, 2020, 10:04am UTC](https://community.thunkable.com/t/guide-for-checking-if-text-is-number/981590/11 "2020-11-18T10:04:21Z")
ok thanks i have updated the image now its working now working with no error! ---
**Author:** ![eko.devs.apploroceo](https://sea1.discourse-cdn.com/flex015/user_avatar/community.thunkable.com/eko.devs.apploroceo/32/93147_2.png) [@eko.devs.apploroceo](https://community.thunkable.com/u/eko.devs.apploroceo)\ **Post date:** [November 19, 2020, 3:18am UTC](https://community.thunkable.com/t/guide-for-checking-if-text-is-number/981590/12 "2020-11-19T03:18:37Z")
now topic seems ok ---
**Author:** ![vanilla0bean](https://sea1.discourse-cdn.com/flex015/user_avatar/community.thunkable.com/vanilla0bean/32/89368_2.png) [@vanilla0bean](https://community.thunkable.com/u/vanilla0bean)\ **Post date:** [November 19, 2020, 7:27am UTC](https://community.thunkable.com/t/guide-for-checking-if-text-is-number/981590/13 "2020-11-19T07:27:32Z")
Thanks :\> ---
**Author:** ![luv.ak.tech](https://sea1.discourse-cdn.com/flex015/user_avatar/community.thunkable.com/luv.ak.tech/32/104896_2.png) [@luv.ak.tech](https://community.thunkable.com/u/luv.ak.tech)\ **Post date:** [November 19, 2020, 7:48am UTC](https://community.thunkable.com/t/guide-for-checking-if-text-is-number/981590/14 "2020-11-19T07:48:52Z")
your welcome @vanilla0bean glad you liked it ---
**Author:** ![drted](https://sea1.discourse-cdn.com/flex015/user_avatar/community.thunkable.com/drted/32/92694_2.png) [@drted](https://community.thunkable.com/u/drted)\ **Post date:** [November 20, 2020, 8:13pm UTC](https://community.thunkable.com/t/guide-for-checking-if-text-is-number/981590/15 "2020-11-20T20:13:36Z")
Is 123.786 a number? Is -67 a number? ---
**Author:** ![tatiang](https://sea1.discourse-cdn.com/flex015/user_avatar/community.thunkable.com/tatiang/32/55482_2.png) [@tatiang](https://community.thunkable.com/u/tatiang)\ **Post date:** [November 20, 2020, 8:47pm UTC](https://community.thunkable.com/t/guide-for-checking-if-text-is-number/981590/16 "2020-11-20T20:47:39Z")
> [@drted](#): > > Is 123.786 a number? > Is -67 a number? You and your outliers! 😆 ---
**Author:** ![drted](https://sea1.discourse-cdn.com/flex015/user_avatar/community.thunkable.com/drted/32/92694_2.png) [@drted](https://community.thunkable.com/u/drted)\ **Post date:** [November 20, 2020, 8:52pm UTC](https://community.thunkable.com/t/guide-for-checking-if-text-is-number/981590/17 "2020-11-20T20:52:57Z")
Me and my maps! ---
**Author:** ![luv.ak.tech](https://sea1.discourse-cdn.com/flex015/user_avatar/community.thunkable.com/luv.ak.tech/32/104896_2.png) [@luv.ak.tech](https://community.thunkable.com/u/luv.ak.tech)\ **Post date:** [November 21, 2020, 6:36am UTC](https://community.thunkable.com/t/guide-for-checking-if-text-is-number/981590/18 "2020-11-21T06:36:07Z")
if you want to add . and - just add it in the list of numbers ---
**Author:** ![lewws66](https://avatars.discourse-cdn.com/v4/letter/l/9de053/32.png) [@lewws66](https://community.thunkable.com/u/lewws66)\ **Post date:** [March 20, 2023, 4:55pm UTC](https://community.thunkable.com/t/guide-for-checking-if-text-is-number/981590/19 "2023-03-20T16:55:28Z")
![check if Text_input is number or contains letters of the alphabet](https://us1.discourse-cdn.com/flex015/uploads/thunkable/original/3X/9/a/9aade281b8f75a04f64ab2d4f80155d6427fc366.jpeg) I used this logical check : If (Text\_input + 0 not equals to Text\_input) then Alert message "input is not a number ---
**Author:** ![ioannis](https://sea1.discourse-cdn.com/flex015/user_avatar/community.thunkable.com/ioannis/32/146956_2.png) [@ioannis](https://community.thunkable.com/u/ioannis)\ **Post date:** [November 8, 2024, 12:21pm UTC](https://community.thunkable.com/t/guide-for-checking-if-text-is-number/981590/21 "2024-11-08T12:21:33Z")