HP HP-28S - Recalling a Numerical Variable; Evaluating a Numerical Variable

Recalling a Numerical Variable
Now that you've created the variable VOL, return its value to the
stack.
Put the name VOL on the stack, taking advantage of the USER menu.
~ VOL I ENTER I 3:
Recall the contents of VOL.
.IRCLI
2:
1: 'VOL'
0. ____ _
3:
2:
1: 133
0. ____ _
This is the number you stored in VOL.
If you're accustomed to a calculator with storage registers, recalling is
a familiar process.
On the HP-28S, variables are recalled infrequently;
more often they are evaluated.
Evaluating a Numerical Variable
For numerical variables, "evaluating" has the same meaning as "recall-
ing"-evaluating a numerical variable returns the number to the stack.
You'll see
that evaluation is easier. (When you create a program vari-
able later in this chapter, you'll see that evaluating and recalling can
have quite different effects.)
Return the value of VOL to the stack by evaluation.
VOL
3:
2: 133
1: 133
0. ____ _
You can also evaluate VOL by typing in its name without quotes.
VOL I ENTER I 3: 133
2: 133
1: 133
0. ____ _
50 3: Using Variables
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