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