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Synopsis:
    #include <math.h>
    double fmod( double x, double y );

Description:
    The fmod function computes the floating-point remainder of x/y, even if
    the quotient x/y is not representable.

Returns:
    The fmod function returns the value x - (i * y), for some integer i such
    that, if y is non-zero, the result has the same sign as x and magnitude
    less than the magnitude of y.  If the value of y is zero, then the value
    returned is zero.

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

    void main()
      {
        printf( "%f\n", fmod(  4.5,  2.0 ) );
        printf( "%f\n", fmod( -4.5,  2.0 ) );
        printf( "%f\n", fmod(  4.5, -2.0 ) );
        printf( "%f\n", fmod( -4.5, -2.0 ) );
      }

    produces the following:

    0.500000
    -0.500000
    0.500000
    -0.500000

Classification:
    ANSI

Systems:
    Math

See Also:
    ceil, fabs, floor