Repeat n [list]
DoUntil [list] [cond]
DoWhile [list] [cond]
While [cond] [list]
|Repeat instructions in list forever.
STOP button to cancel.
Repeat instructions in list n times.
Do instructions in list until condition is true.
Do instructions in list while condition is true.
While condition is true, do instructions in list.
|For [x a b s] [list]
ForEach var [list1] [list2]
|For x from a to b, with optional step
s, do instructions in list.
For each element of list 1, do instructions in list 2.
Return the number of times a repeat loop has executed.
|Stop and break out of procedure or
Stop and break out of all procedures or loops, end program.
Break out of procedure or loop with output value xx.