smarty/docs/designers/language-custom-functions/language-function-counter.md

{counter}

{counter} is used to print out a count. {counter} will remember the count on each iteration. You can adjust the number, the interval and the direction of the count, as well as determine whether or not to print the value. You can run multiple counters concurrently by supplying a unique name for each one. If you do not supply a name, the name "default" will be used.

If you supply the assign attribute, the output of the {counter} function will be assigned to this template variable instead of being output to the template.

Attribute Name Type Required Default Description

---

    name        string       No      *default*  The name of the counter
   start        number       No         *1*     The initial number to start counting from
    skip        number       No         *1*     The interval to count by
 direction      string       No        *up*     The direction to count (up/down)
   print        boolean      No       *TRUE*    Whether or not to print the value
   assign       string       No        *n/a*    the template variable the output will be assigned to


{* initialize the count *}
{counter start=0 skip=2}<br />
{counter}<br />
{counter}<br />
{counter}<br />

this will output:

0<br />
2<br />
4<br />
6<br />