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Function std.math.nextPow2
Gives the next power of two after val
. T
can be any built-in
numerical type.
T nextPow2(T)
(
const T val
)
if (isIntegral!T);
T nextPow2(T)
(
const T val
)
if (isFloatingPoint!T);
If the operation would lead to an over/underflow, this function will
return 0
.
Parameters
Name | Description |
---|---|
val | any number |
Returns
the next power of two after val
Example
writeln(nextPow2(2)); // 4
writeln(nextPow2(10)); // 16
writeln(nextPow2(4000)); // 4096
writeln(nextPow2(-2)); // -4
writeln(nextPow2(-10)); // -16
writeln(nextPow2(uint .max)); // 0
writeln(nextPow2(uint .min)); // 0
writeln(nextPow2(size_t .max)); // 0
writeln(nextPow2(size_t .min)); // 0
writeln(nextPow2(int .max)); // 0
writeln(nextPow2(int .min)); // 0
writeln(nextPow2(long .max)); // 0
writeln(nextPow2(long .min)); // 0
Application output
Running...
Example
writeln(nextPow2(2.1)); // 4.0
writeln(nextPow2(-2.0)); // -4.0
writeln(nextPow2(0.25)); // 0.5
writeln(nextPow2(-4.0)); // -8.0
writeln(nextPow2(double .max)); // 0.0
writeln(nextPow2(double .infinity)); // double.infinity
Application output
Running...
Authors
Walter Bright, Don Clugston, Conversion of CEPHES math library to D by Iain Buclaw and David Nadlinger
License
Copyright © 1999-2018 by the D Language Foundation | Page generated by ddox.