@step

The @step keyword reads the current block's zero-based iteration index.

Warning: @step is not the same as [step]. [step] is 1-based, while @step is 0-based. The stdlib helper equivalent of @step is [step-index].

@step is read-only. You may use it as a plain expression or with <@step>, but assigning to it is a compile-time error.

If no repeater is active, @step reads as 0.

[rep:4][sep:", "]{@step}

0, 1, 2, 3