Iterators

An iterative operation must be driven by an enumeration , or at least stopped at some point by a given condition . In an OMLoop, this control is enabled by four iterators :

Iterators can enumerate items in lists, but above all, they can stop the OMloop once this enumeration is over. This is why a loop must always have at least one iterator : otherwise, it goes on with infinite iterations.

If several iterators are used simultaneously, the loop stops as soon as one of them stops.