# Loop and trace

**URL:** <https://forum.kirupa.com/t/loop-and-trace/252552>\
**Category:** Uncategorized\
**Created:** [February 21, 2008, 5:43am UTC](https://forum.kirupa.com/t/loop-and-trace/252552 "2008-02-21T05:43:18Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![nameez](https://avatars.discourse-cdn.com/v4/letter/n/2acd7d/32.png) [@nameez](https://forum.kirupa.com/u/nameez)\
**Post date:** [February 21, 2008, 5:43am UTC](https://forum.kirupa.com/t/loop-and-trace/252552/1 "2008-02-21T05:43:18Z")

</div>

i have an object called input\_obj i want to trace a property value in it.

```auto
 trace(input_obj.item[0].catagory[0].product[0].size1);
trace(input_obj.item[0].catagory[0].product[0].size2);
trace(input_obj.item[0].catagory[0].product[0].size3); 
this works but i need to loop through and trace.

```

this wont work

```auto

     for(i=1;i<6;i++){
    trace(input_obj.item[0].catagory[0].product[0].size+i);
} 

```

Returns NaN