Double.PositiveInfinity 字段

定义

重要

一些信息与预发行产品相关，相应产品在发行之前可能会进行重大修改。对于此处提供的信息，Microsoft 不作任何明示或暗示的担保。

表示正无穷。此字段为常数。

public: double PositiveInfinity = Infinity;

public const double PositiveInfinity = Infinity;

val mutable PositiveInfinity : double

Public Const PositiveInfinity As Double  = Infinity

Value = Infinity

Double

以下代码示例演示了的用法 PositiveInfinity：

// This will equal Infinity.
Console::WriteLine( "PositiveInfinity plus 10.0 equals {0}.", (Double::PositiveInfinity + 10.0) );

// This will equal Infinity.
Console.WriteLine("PositiveInfinity plus 10.0 equals {0}.", (Double.PositiveInfinity + 10.0).ToString());

// This will equal Infinity.
printfn $"PositiveInfinity plus 10.0 equals {Double.PositiveInfinity + 10.}."

' This will equal Infinity.
Console.WriteLine("PositiveInfinity plus 10.0 equals " + (Double.PositiveInfinity + 10).ToString() + ".")

此常量的值是将正数除以零的结果。

当操作的结果大于 Double.MaxValue时，将返回此常量。

使用 IsPositiveInfinity 确定值的计算结果是否为正无穷大。

产品	版本
.NET	Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9, 10
.NET Framework	1.1, 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1
.NET Standard	1.0, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 2.0, 2.1
UWP	10.0