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    Command:

    fabsf

    
    
    

    SYNOPSIS

           #include <math.h>
    
           double fabs(double x);
           float fabsf(float x);
           long double fabsl(long double x);
    
           Link with -lm.
    
       Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
    
           fabsf(), fabsl():
               _BSD_SOURCE || _SVID_SOURCE || _XOPEN_SOURCE >= 600 ||
               _ISOC99_SOURCE || _POSIX_C_SOURCE >= 200112L;
               or cc -std=c99
    
    
    

    DESCRIPTION

           These functions return the absolute value of the floating-point  number
           x.
    
    
    

    RETURN VALUE

           These functions return the absolute value of x.
    
           If x is a NaN, a NaN is returned.
    
           If x is -0, +0 is returned.
    
           If  x  is  negative infinity or positive infinity, positive infinity is
           returned.
    
    
    

    ERRORS

           No errors occur.
    
    
    

    ATTRIBUTES

       Multithreading (see pthreads(7))
           The fabs(), fabsf(), and fabsl() functions are thread-safe.
    
    
    

    CONFORMING TO

           C99, POSIX.1-2001.  The variant returning double also conforms to SVr4,
           4.3BSD, C89.
    
    
    

    SEE ALSO

           abs(3), cabs(3), ceil(3), floor(3), labs(3), rint(3)
    
                                      2013-07-10                           FABS(3)
    
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