HP Prime Graphing Calculator - Manual (Page 46)

42 Getting started
You can repeat the previous calculation simply by pressing
E . This can be useful if the previous calculation
involved Ans. For example, suppose you want to calculate
the nth root of 2 when n is 2, 4, 8, 16, 32, and so on.
1. Calculate the square root of 2.
Sj 2 E
2. Now enter √Ans.
SjS+E
This calculates the fourth root of 2.
3. Press E
repeatedly. Each time
you press, the root is
twice the previous
root. The last answer
shown in the
illustration at the right
is .
To reuse an
expression or result
from the CAS
When your are working in Home view, you can retrieve
an expression or result from the CAS by tapping Z and
selecting Get from CAS. The CAS opens. Press = or
\ until the item you want to retrieve is highlighted and
press E . The highlighted item is copied to the cursor
point in Home view.
Storing a value in a variable
You can store a value in a variable (that is, assign a value
to a variable). Then when you want to use that value in a
calculation, you can refer to it by the variable’s name. You
can create your own variables, or you can take advantage
of the built-in variables in Home view (named A to Z and

) and in the CAS (named a to z, and a few others). CAS
variables can be used in calculations in Home view, and
Home variables can be used in calculations in the CAS.
There are also built-in app variables and geometry
variables. These can also be used in calculations.
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