Memory And Variables - HP 35s Quick Start Manual

and placing the cursor at the end of that expression, the
expression can be changed and reevaluated. For example,
if after computing the number of combinations of 69 items
taken 2 at a time, you then decide to determine the num-
ber of combinations of 69 items taken 3 at a time, rather
than entering the expression all over again, press
ÖÖ~3Ï. For longer, more complicated expres-
sions, this is often much easier than entering an entire
expression again.
In ALG mode, operations are carried out in order of alge-
braic precedence, where certain functions are evaluated
before others. For example, 1Ù2¸3Ï would
evaluate to 7, since multiplication is done before the addi-
tion. To change this, use parentheses to alter the expres-
sion: 41Ù2Õ¸3Ï. In this instance, the
parentheses are evaluated first, resulting in a value of 9
rather than 7.

Memory and Variables

The HP 35s has 30KB of memory for storing numbers, equa-
tions and programs. Numbers are stored in locations called
variables or registers. Variables are named with a letter from A
to Z, giving 26 directly addressable memory registers. There are
also six registers that contain information for statistical calcula-
14 Getting Started