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Function `std.math.isNaN`

Determines if x is NaN.


						
				bool isNaN(X)
				(
				

				  X x
				

				) pure nothrow @nogc @trusted
				

				if (isFloatingPoint!X);

Parameters

Name	Description
x	a floating point number.

Returns

true if x is Nan.

Example

assert( isNaN(float.init));
assert( isNaN(-double.init));
assert( isNaN(real.nan));
assert( isNaN(-real.nan));
assert(!isNaN(cast(float) 53.6));
assert(!isNaN(cast(real)-53.6));

Authors

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

License

Boost License 1.0.