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Function std.math.traits.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
Copyright © 1999-2022 by the D Language Foundation | Page generated by ddox.