AlcScript Question

Is there any structure in AlcScript that can act as a variable to provide a counter for an "if then else" structure actually thats a better question is there any of the following
Repeat until
If Then Else
For x = 1 to 20...............Next
?
[edit]
If so where is it documented?
[/edit]
Repeat until
If Then Else
For x = 1 to 20...............Next
?
[edit]
If so where is it documented?
[/edit]