The index of an entry in the schedule queue.

Input Format:

An integer greater than zero.

Use with do-loops:

When a QueueEntry variable is used as the dependent variable of a do-loop, the associated loop increment is specified as an Integer constant.

Context:

The control program maintains a queue of scripts to be run, one after the other. The script at the front of the queue is given an index of 0, and scripts towards the back of the queue are given increasing indexes.