ROLL

Calculator Key: ■Roll

Member Of Menu: 
None
Argument Types: 
Any
Real
Result Type(s): 
Any
Invertible: 
No
Valid In Expression: 
No
Stack Diagram: 
Item1 Item2 ... Itemn-1 Itemn Realn+1 → Item2 ... Itemn-1 Itemn Item1

This operation takes a real number from the stack which is the number of items on the stack to roll down. That number is referred to as "n" in the rest of this description. The item "n" items below that real number on the stack is then removed and pushed onto the top of the stack, rolling those "n" items.