@node abs, math
@subheading Syntax

@example
#include <stdlib.h>

int abs(int value);
@end example

@subheading Return Value

The absolute value of @code{value} is returned.

@subheading Portability

@portability ansi, posix

@subheading Example

@example
int sq = 7;
sq = sq * abs(sq) + 1;
@end example