View source code
Display the source code in std/math.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.log2
Calculates the base-2 logarithm of x: log2x
real log2
(
real x
) pure nothrow @nogc @safe;
| x | log2(x) | divide by 0? | invalid? |
|---|---|---|---|
| ±0.0 | -∞ | yes | no |
| <0.0 | NAN | no | yes |
| +∞ | +∞ | no | no |
Example
assert(isClose(log2(1024.0L), 10));
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.