26045 - Truncate a decimal value without rounding

Sample 26045: Truncate a decimal value without rounding

This sample truncates X to to digits past the decimal without rounding. The CEIL function is applied to negative values while the FLOOR function is applied to positive values, and both can be conditionally applied with the IFN function.

%let precision=10**-2;  /* can also be expressed as .01 */
data ds1; 
  input x; 
  y=ifn(x<0,ceil(x/&precision),floor(x/&precision)) * &precision; 
  datalines; 
16.58849 
-5.12945 
-.135 
100.12 
; 
run;

proc print data=ds1;
  format x 10.5 y;
run;

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                                   Obs             x          y

                                    1       16.58849      16.58
                                    2       -5.12945      -5.12
                                    3       -0.13500      -0.13
                                    4      100.12000     100.12

Type:	Sample
Topic:	SAS Reference ==> DATA Step SAS Reference ==> Functions ==> Truncation

Date Modified:	2012-02-21 15:05:21
Date Created:	2006-03-17 10:55:12

Product Family	Product	Host	SAS Release
			Starting	Ending
SAS System	Base SAS	All	n/a	n/a

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Sample 26045: Truncate a decimal value without rounding

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