HP HP-15C, Owner'S Handbook Manual

Page: 19 / 288

Section 1: Getting Started 19
Notice that when you press the
´
or
|
prefix key, an f or g annunciator appears
and remains in the display until a function
key is pressed to complete the sequence.
Prefix Keys
A prefix key is any key which must precede another key to complete the
key sequence for a function. Certain functions require two parts: a prefix
key and a digit or other key. For your reference, the prefix keys are:
" ^ • G f > i O
m ´ | P I l F T
s ? t H b < _ X
If you make a mistake while keying in a prefix for a function, press
´
CLEAR
u
to cancel the error. The
CLEAR
u
key is also used
to show the mantissa of a displayed number, so all 10 digits of the number
in the display will appear for a moment after the
u
key is pressed.
Changing Signs
Pressing
“
(change sign) will change the sign (positive or negative) of
any displayed number. To key in a negative number, press
“
after its
digits have been keyed in.
Keying in Exponents
‛
(enter exponent) is used when keying in a number with an exponent.
First key in the mantissa, then press
‛
and key in the exponent.
For a negative exponent press
“
after keying in the exponent.
*
For
example, to key in Planck's constant (6.6262×10
-34
Joule-seconds) and
multiply it by 50:
*
“
may also be pressed after
‛
and before the exponent, with the same result (unlike the mantissa,
where digit entry must precede
“
).
0.0000
f