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The ABS function can be used to return a positive value...
DATA POSITIVE_INTEGER; VALUE = abs(-789); RUN; PROC PRINT; RUN;
And now in version 9.2, the SUMABS function is available, and will compute the sum of the absolute value of the non-missing arguments:
DATA POSITIVE_INTEGER; VALUE = sumabs(-1, 3, 0, ., -10); RUN; PROC PRINT; RUN;
will return a value of 14
Submitted by S.M.Ayetullah. Contact me at my Discussion Page.