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Function `std.math.fdim`

Returns the positive difference between x and y.


						
				real fdim
				(
				

				  real x,
				

				  real y
				

				) pure nothrow @nogc @safe;

Equivalent to fmax(x-y, 0).

Returns

Special Values
x, y	fdim(x, y)
x > y	x - y
x <= y	+0.0

Example

writeln(fdim(2.0, 0.0)); // 2.0
writeln(fdim(-2.0, 0.0)); // 0.0
writeln(fdim(real.infinity, 2.0)); // real.infinity
assert(isNaN(fdim(real.nan, 2.0)));
assert(isNaN(fdim(2.0, real.nan)));
assert(isNaN(fdim(real.nan, real.nan)));

Authors

Walter Bright, Don Clugston, Conversion of CEPHES math library to D by Iain Buclaw and David Nadlinger

License

Boost License 1.0.