The activity is in the subsectionBasic - Loops. In the loop, the number of repetitions is given by the numeric range [a; b]. Each time the loop is entered, the counter changes to 1. When b is reached, the loop stops.
The activity in properties must include:
"From" — range start;
"To" — end of range;
"Index" — a variable to store the number of the current iteration.
If a range is specified for a<b, index increases by 1 each time, for a>b — decreases.