HP 12C Platinum and
DM 41L: Rounding Numbers
Introduction
The following programs will round any positive number to any number of decimal places, regardless of your
fix/float settings. The formula for
rounding x to n decimal places:
int(10^n * x + 0.5) / 10^n
HP 12C Platinum
Program (also for HP 12C): Rounding a positive number
|
Step
|
Key Code
|
Key
|
|
|
001
|
1
|
1
|
|
|
002
|
0
|
0
|
|
|
003
|
34
|
x<>y
|
|
|
004
|
21
|
y^x
|
|
|
005
|
20
|
*
|
|
|
006
|
43, 40
|
LST x
|
For HP 12C regular: the code is 43, 36
|
|
007
|
34
|
x<>y
|
|
|
008
|
48
|
.
|
|
|
009
|
5
|
5
|
|
|
010
|
40
|
+
|
|
|
011
|
43, 25
|
ITNG
|
|
|
012
|
34
|
x<>y
|
|
|
013
|
10
|
÷
|
|
|
014
|
43, 33, 000
|
GTO 000
|
|
DM 41L (also for HP
41C) Program ROUND: Rounding a positive number
01 LBL ROUND
02 10^X
03 *
04 LASTx
05 x<>y
06 .5
07 +
08 INT
09 x<>y
10 /
11 RTN
Examples
Instructions: Enter
x, press [ENTER], enter n, execute the program
|
x
|
n
|
Result
|
|
0.83
|
1
|
0.8
|
|
8.21365
|
4
|
8.2137
|
|
170561.7737
|
0
|
170562
|
|
π
|
4
|
3.1416
|
Source:
Keith Oldham, Jan Myland, and Jerome Spanier An Atlas of Functions Second Edition, Springer.
2009 ISBN 978-0-387-48806-6
Eddie
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