MathF.Log2(Single) 方法
定义
返回指定数字以 2 为底的对数。Returns the base 2 logarithm of a specified number.
public:
static float Log2(float x);
public static float Log2 (float x);
static member Log2 : single -> single
Public Shared Function Log2 (x As Single) As Single
参数
- x
- Single
要查找其对数的数字。A number whose logarithm is to be found.
返回
下表中的值之一。One of the values in the following table.
x 参数x parameter
| 返回值Return value |
|---|---|
| 正Positive | x 以 2 为底的对数,即 log 2x。The base 2 log of x; that is, log 2x.
|
| 零Zero | NegativeInfinity |
| 负数Negative | NaN |
| 等于 NaNEqual to NaN | NaN |
| 等于 PositiveInfinityEqual to PositiveInfinity | PositiveInfinity |
注解
参数 x 被指定为以10为基数的数字。Parameter x is specified as a base 10 number.
此方法调入基础 C 运行时,并且不同的操作系统或体系结构的确切结果或有效输入范围可能不同。This method calls into the underlying C runtime, and the exact result or valid input range may differ between different operating systems or architectures.