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Function `std.math.isInfinity`

Determines if x is ±∞.


						
				bool isInfinity(X)
				(
				

				  X x
				

				) pure nothrow @nogc @trusted
				

				if (isFloatingPoint!X);

Parameters

Name	Description
x	a floating point number.

Returns

true if x is ±∞.

Example

assert(!isInfinity(float.init));
assert(!isInfinity(-float.init));
assert(!isInfinity(float.nan));
assert(!isInfinity(-float.nan));
assert(isInfinity(float.infinity));
assert(isInfinity(-float.infinity));
assert(isInfinity(-1.0f / 0.0f));

Authors

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

License

Boost License 1.0.