View source code
Display the source code in std/math/operations.d from which this page was generated on github.
Report a bug
If you spot a problem with this page, click here to create a Bugzilla issue.
Improve this page
Quickly fork, edit online, and submit a pull request for this page. Requires a signed-in GitHub account. This works well for small changes. If you'd like to make larger changes you may want to consider using local clone.

Function std.math.operations.NaN

Create a quiet NAN, storing an integer inside the payload.

real NaN (
  ulong payload
) pure nothrow @nogc @trusted;

For floats, the largest possible payload is 0x3F_FFFF. For doubles, it is 0x3_FFFF_FFFF_FFFF. For 80-bit or 128-bit reals, it is 0x3FFF_FFFF_FFFF_FFFF.


import std.math.traits : isNaN;

real a = NaN(1_000_000);
writeln(getNaNPayload(a)); // 1_000_000


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


Boost License 1.0.