| /* |
| FUNCTION |
| <<labs>>---long integer absolute value |
| |
| INDEX |
| labs |
| |
| ANSI_SYNOPSIS |
| #include <stdlib.h> |
| long labs(long <[i]>); |
| |
| TRAD_SYNOPSIS |
| #include <stdlib.h> |
| long labs(<[i]>) |
| long <[i]>; |
| |
| DESCRIPTION |
| <<labs>> returns |
| @tex |
| $|x|$, |
| @end tex |
| the absolute value of <[i]> (also called the magnitude |
| of <[i]>). That is, if <[i]> is negative, the result is the opposite |
| of <[i]>, but if <[i]> is nonnegative the result is <[i]>. |
| |
| The similar function <<abs>> uses and returns <<int>> rather than |
| <<long>> values. |
| |
| RETURNS |
| The result is a nonnegative long integer. |
| |
| PORTABILITY |
| <<labs>> is ANSI. |
| |
| No supporting OS subroutine calls are required. |
| */ |
| |
| #include <stdlib.h> |
| |
| long |
| _DEFUN (labs, (x), |
| long x) |
| { |
| if (x < 0) |
| { |
| x = -x; |
| } |
| return x; |
| } |