Math.ILogB(Double) Method

Reference

Definition

Namespace:: System

Assembly:: System.Runtime.dll

Assembly:: System.Runtime.Extensions.dll

Source:: Math.cs

Source:: Math.cs

Source:: Math.cs

Important

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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

Int32

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 NegativeInfinity	Int32.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

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