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Synopsis:
    #include <math.h>
    double fabs( double x );

Description:
    The fabs function computes the absolute value of the argument x.

Returns:
    The fabs function returns the absolute value of x.

See Also:
    abs, labs

Example:
    #include <stdio.h>
    #include <math.h>

    void main()
      {
        printf( "%f %f\n", fabs(.5), fabs(-.5) );
      }

    produces the following:

    0.500000 0.500000

Classification:
    ANSI

Systems:
    All