abs(S)                         6 January 1993                         abs(S)


 Name

    abs - return integer absolute value

 Syntax


    cc ... -lc


    #include <stdlib.h>

    int abs (i)
    int i;


 Description

    The abs function returns the absolute value of its integer operand.

 See also

    fabs(S), floor(S)

 Note

    In two's-complement representation, the absolute value of the negative
    integer with largest magnitude is undefined.

 Standards conformance

    abs is conformant with:
    AT&T SVID Issue 2;
    X/Open Portability Guide, Issue 3, 1989;
    ANSI X3.159-1989 Programming Language -- C;
    Intel386 Binary Compatibility Specification, Edition 2 (iBCSe2);
    IEEE POSIX Std 1003.1-1990 System Application Program Interface (API) [C
    Language] (ISO/IEC 9945-1);
    and NIST FIPS 151-1.