How do I check whether a string is a number?

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- TwinBlazar
- - Joined 14 Apr, 2013
  - 85 topics • 413 posts
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- 25 Jul, 2014
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Quick question: is there a function that return true when a given string is a number?
- codah
- - Joined 30 May, 2014
  - 46 topics • 1,646 posts
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- 25 Jul, 2014
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int("string") > 0 will work other than for zero. Otherwise you could use a regular expression.
- Robsta
- - Joined 17 Jan, 2014
  - 26 topics • 98 posts
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- 25 Jul, 2014
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For additional precision you could use

"string" = "0"

or

int("string") != 0.
- TwinBlazar
- - Joined 14 Apr, 2013
  - 85 topics • 413 posts
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- 25 Jul, 2014
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Thanks guys
- Magistross
- - Joined 4 Jul, 2011
  - 8 topics • 1,092 posts
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- 25 Jul, 2014
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There is a function that returns true when a given string is NOT a number. It's not wrapped in any System expression so you'll have to use the Browser.ExecJS expression.
```
Browser.ExecJS("!isNaN(""" & yourVar & """);")[/code:1zas59qt]

This will return 1 if yourVar is a valid javascript number.
```
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- TwinBlazar
- - Joined 14 Apr, 2013
  - 85 topics • 413 posts
- 1
- 6 Sep, 2014
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int(x) got one problem. If x < 1 (ie. 0.5), it will return 0, which is also the value to indicate that x is not a number. To remedy this, use float(x) instead.