# How to convert string to number?

**URL:** <https://forum.kirupa.com/t/how-to-convert-string-to-number/85954>\
**Category:** Uncategorized\
**Created:** [April 8, 2005, 4:35pm UTC](https://forum.kirupa.com/t/how-to-convert-string-to-number/85954 "2005-04-08T16:35:31Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![daffodill](https://avatars.discourse-cdn.com/v4/letter/d/57b2e6/32.png) [@daffodill](https://forum.kirupa.com/u/daffodill)\
**Post date:** [April 8, 2005, 4:35pm UTC](https://forum.kirupa.com/t/how-to-convert-string-to-number/85954/1 "2005-04-08T16:35:31Z")

</div>

i have two strings  
a = 11 b =12  
i want their sum,

i wrote

var sum:Number = a + b ;

its giving me 1112 as oppsed to 23.

how do i do it ???

i tried

sum = new Number(a ) + new Number (b )

its undefined here.  
plz help.