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Input; Display Mode And Format Of Numbers - HP -22S Owner's Manual

Scientific calculator.
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Calculate the percent change between 17 and 29:
Keys:
Display:
Description:
17
1
INPUT
1
17.0000 :
Enters
numberl'
29
: 29
Colon precedes
number2'
.I%CHGI
70.5882
Calculates the percent
change.
Calculate the number of combinations of 4 items taken 2 at a time:
4
1
INPUT
12.1
PROB
1
{Cn,r}
6.0000
Calculates number of
combinations.
Display Mode and Format of Numbers
When you turn on the HP-22S for the first time, numbers are dis-
played with four decimal places and a period as the decimal point.
The
display format
controls how numbers appear in the display.
Regardless of the current display format, each number is stored as a
signed, 12-digit mantissa with a signed, three-digit exponent. ... For ex-
ample, pressing.GJ in FIX 4 mode (4 decimal places) displays
3.1416. Internally, the number is stored as 3.14159265359 x 10
000 .
If a number doesn't fit in the current display format, the displayed
number is rounded to fit.
• During complex internal calculations, the HP-22S uses IS-digit precision for intermediate
results.
22
1: Getting Started

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