HP 15C User Manual download pdf (Page 19)

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:

•

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

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HP 15C User Manual Page 19