HP 25 User Manual

D I PREFIX I 1 2.00
am 1'--_2._00_ ----'
Function Keys 51
Clears the blue prefix keystroke.
The correct operation, change
sign, is performed.
Number Alteration Keys
Besides mm there are three keys provided on the H P-25 for
altering
numbers . These keys are ~ , I FRAC I and [[2J , and
they are
most useful when performing operations as p ar t of a
program .
Absolute Value
Some calculations require the abso lute value, or magnitude,
of a number. To obtain the absolute value of the number in the
display,
press the III prefix key followed by the ~ (abso lut e
va
lu e) key. For example, to calculate the absolute value of - 3:
Press Display
1 -3 .
1 3.00
1-3 1
To see the absolute value of +3:
Press Display
III ~ 13.00 1 1+ 31
Integer Portion of a Number
To extract and display the integer portion ofa number , press the
D prefix key followed by theCJ (integer) ke y. For example ,
to display only the integers
of the number 123.456:
Press
123.456
D OEfJ
Display
1 123.456
1123.00
Only the integer portion of the
number remains .
When OEfJ is pressed, the fractional portion of the number is
lost.
The entire number , of course, is preserved in the LAST X
register.
Fractional Portion of a Number
To place only the fractional portion of a number into the dis-
pl aye d X-register, press the III prefix key followed by the

HP 25 Specifications

General

Brand	HP
Model	25
Category	Calculator
Language	English