# regular expressions
**URL:** https://discussions.unity.com/t/regular-expressions/66635
**Category:** Questions & Answers
**Created:** [March 23, 2013, 12:18am UTC](https://discussions.unity.com/t/regular-expressions/66635 "2013-03-23T00:18:11Z")
**Posts on this page:** 2
**Page:** 1
### Author:  [@Alan\_Fletcher](https://discussions.unity.com/u/Alan_Fletcher)
#### Post date: [March 23, 2013, 12:18am UTC](https://discussions.unity.com/t/regular-expressions/66635/1 "2013-03-23T00:18:11Z")
Hello
I am using the following regex command to only allow numbers be inputted into a text field
```
Regex rgx = new Regex("[^0-9]");
```
` `however this obviously doesnt allow the inputting of positive and negative signs +/-. I would like to be able to input -9 for a negative value but when i do it comes back as 09 instead. Any help in getting the regular expression right would be appreciated.
Thanking You
---
### Author:  [@Alan\_Fletcher](https://discussions.unity.com/u/Alan_Fletcher)
#### Post date: [March 23, 2013, 1:05am UTC](https://discussions.unity.com/t/regular-expressions/66635/2 "2013-03-23T01:05:24Z")
this works for anyone who comes across a similar prob
```
Regex rgx = new Regex("[^-][^0-9]+");
```