# \[AS2 CS4\]basic variables question

**URL:** <https://forum.kirupa.com/t/as2-cs4-basic-variables-question/307700>\
**Category:** flash\
**Created:** [April 8, 2010, 5:02pm UTC](https://forum.kirupa.com/t/as2-cs4-basic-variables-question/307700 "2010-04-08T17:02:15Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![morn](https://avatars.discourse-cdn.com/v4/letter/m/73ab20/32.png) [@morn](https://forum.kirupa.com/u/morn)\
**Post date:** [April 8, 2010, 5:02pm UTC](https://forum.kirupa.com/t/as2-cs4-basic-variables-question/307700/1 "2010-04-08T17:02:15Z")

</div>

Hi,  
I want to edit a variable in \_root from a function

it should look like this:

```auto
var index:number = 0;

function fnct (root_counter){
              root_counter ++;    
}

fnct(index);
trace (index) // 1

fnct(index);
trace (index) // 2

fnct(index);
trace (index) // 3

```

well this way it isn’t working 🙂  
hope you can help!