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 fabsl()                 Calculate Long Double Absolute Value

 #include   <stdlib.h>
 #include   <math.h>

 long double fabsl(x);
 long double x;

    This is the long double-precision version of fabs(); it calculates
    the absolute value of a long double-precision floating point
    value. See fabs() for more information.

    Returns:    The absolute value of x.

 Portability:   Not supported by the ANSI standard.