Smarty counter variable is defined in parent file but incremented and used in child include file

Question

I like to define a counter variable in the parent tpl file (First.tpl) and increment and use it in the child include file (Second.tpl).

But the counter is no longer incremented.

First.tpl:

{assign var = "counter" value = 1 scope = "global"}
{foreach ...} //iterates at least 100 times
  {include file='Second.tpl'}
{/foreach}

Second.tpl:

{assign var="counter" value = $counter 1}
{$counter} //counter does not increase!

{if $counter > 10} do-something {/if} // if statement fails always!

Answer 1

This is the method I use to do something similar, increment a value inside a loop, and pass that value to the included file. try it:

First.tpl

{assign var="counter" value=0}
{foreach ...} /* iterates at least 100 times */
    {assign var="counter" value=$counter+1}
    {include file='Second.tpl' counter=$counter}
{/foreach}

Second.tpl

{$counter} /* Check if counter increase */

{if $counter > 10} do-something {/if}

Notice. - I initialize $counter to zero.