Subtract 25 from 30.
The result is 5.
Clearing Objects From the Stack
As you worked these examples, you accumulated quite a few numbers
on the stack. The stack grows without limit as you put more objects
on the stack, and those objects remain until you use them in an oper-
ation or until you clear them.
You can clear objects one at a time or all at once.
Clear the number in level 1.
IiiDIi1III . .
Objects in higher levels move down one level each.
Clear all objects from the stack.
. , CLEAR
It's a good idea to clear the stack whenever you start a problem. As
you work on the problem you'll know that all objects on the stack are
relevant to the current problem, not left over from the previous
2: Doing Arithmetic