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Math.ILogB(Double) Method

Definition

Returns the base 2 integer logarithm of a specified number.

public:
 static int ILogB(double x);
public static int ILogB (double x);
static member ILogB : double -> int
Public Shared Function ILogB (x As Double) As Integer

Parameters

x
Double

The number whose logarithm is to be found.

Returns

One of the values in the following table.

x parameter Return value
Default The base 2 integer log of x; that is, (int)log2(x).
Zero Int32.MinValue
Equal to NaN or PositiveInfinity or NegativeInfinityInt32.MaxValue

Remarks

Parameter x is specified as a base 10 number.

This method calls into the underlying C runtime, and the exact result or valid input range may differ between different operating systems or architectures.

Applies to