Display the source code in std/math.d from which this page was generated on github.

If you spot a problem with this page, click here to create a Bugzilla issue.

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.ilogb`

Extracts the exponent of x as a signed integral value.


						
				int ilogb(T)
				(
				

				  const T x
				

				) pure nothrow @nogc @trusted
				

				if (isFloatingPoint!T);
				

				

				int ilogb(T)
				(
				

				  const T x
				

				) pure nothrow @nogc @safe
				

				if (isIntegral!T && isUnsigned!T);
				

				

				int ilogb(T)
				(
				

				  const T x
				

				) pure nothrow @nogc @safe
				

				if (isIntegral!T && isSigned!T);

If x is not a special value, the result is the same as cast(int) logb(x).

Special Values
x	ilogb(x)	Range error?
0	FP_ILOGB0	yes
±∞	int.max	no
NAN	FP_ILOGBNAN	no

Authors

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

License

Boost License 1.0.

API Documentation

Function std.math.ilogb

Authors

License

Function `std.math.ilogb`