Double.IsPositiveInfinity(Double) 方法

定义

命名空间:
System
程序集:
mscorlib.dll, System.Runtime.dll
程序集:
netstandard.dll, System.Runtime.dll
程序集:
System.Runtime.dll
程序集:
mscorlib.dll
程序集:
netstandard.dll
Source:
Double.cs
Source:
Double.cs
Source:
Double.cs
Source:
Double.cs
Source:
Double.cs

返回一个值，该值指示指定的数字是否计算为正无穷大。

public:
 static bool IsPositiveInfinity(double d);
public:
 static bool IsPositiveInfinity(double d) = System::Numerics::INumberBase<double>::IsPositiveInfinity;
public static bool IsPositiveInfinity(double d);
static member IsPositiveInfinity : double -> bool
Public Shared Function IsPositiveInfinity (d As Double) As Boolean

参数

d
Double

双精度浮点数。

返回

Boolean

true 如果 d 计算结果为 PositiveInfinity，则为 ;否则为 false。

实现

IsPositiveInfinity(TSelf)

示例

以下代码示例展示了 IsPositiveInfinity 的用法：

// This will return "true".
Console.WriteLine("IsPositiveInfinity(4.0 / 0) == {0}.", Double.IsPositiveInfinity(4.0 / 0) ? "true" : "false");

// This will return "true".
printfn $"IsPositiveInfinity(4.0 / 0) = %b{Double.IsPositiveInfinity(4. / 0.)}."

' This will return "True".
Console.Write("IsPositiveInfinity(4.0 / 0) = ")
If Double.IsPositiveInfinity(4 / 0) Then
    Console.WriteLine("True.")
Else
    Console.WriteLine("False.")
End If

注解

浮点操作返回 PositiveInfinity 以发出溢出条件的信号。

适用于

另请参阅