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30
Getting Started
Functions
In spite of the dozens of functions available on the HP-67 keyboard,
you will find the calculator functions simple to operate by using a
single, all-encompassing rule: When you press a function key, the
calculator immediately executes the function written on the key.
Pressing a function key causes the calculator to
immediately perform that function.
For example, to calculate the square of 148.84, merely:
Press
Display
148.84
@
To calculate the square root of the number now in the display:
Press
Display
a
148.84
Notice that you did not use the
function directly overthe [l key to
calculate the square root. The five functions above the ¥, [, @,
{23, and [@ keys are known as default functions. When you first turn
the HP-67 ON, these default functions are presentin the calculator,
and you can select any of them by simply pressing the appropriate
key (E¥ through [&). However, as soon as you begin keying in a
program, the default functions are lost, and the top row keys (7
through (&) are used to select programs or routines within programs.
The only way to restore the default functions to the calculator is to
clear the calculator of all programs, either by turning it OFF, then
ON, or by pressing [
with the W/PRGM-RUN switch
wprGM [ RUN set to W/PRGM.
Each ofthefive default functionsis duplicated by another key on the
keyboard. For example, you can select the square root function either
with the default function
or by pressing ] (Z]. When the default
functions are operational, you can use a default function by pressing
only one keystroke. In this handbook, however, we normally show the
prefixed function instead of the default function.
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