Single.IsPositiveInfinity(Single) 方法

定義

命名空間:

System

組件:

System.Runtime.dll

Source:

Single.cs

傳回值，指出指定數字是否計算結果為正的無限大。

public:
 static bool IsPositiveInfinity(float f) = System::Numerics::INumberBase<float>::IsPositiveInfinity;

public static bool IsPositiveInfinity (float f);

static member IsPositiveInfinity : single -> bool

Public Shared Function IsPositiveInfinity (f As Single) As Boolean

參數

f

Single

單精確度浮點數。

傳回

Boolean

如果 f 計算結果為 PositiveInfinity，則為 true；否則為 false。

實作

IsPositiveInfinity(TSelf)

範例

下列程式碼範例示範 IsPositiveInfinity 方法。

// This will return true.
Console::WriteLine( "IsPositiveInfinity(4.0F / 0) == {0}.", Single::IsPositiveInfinity( 4.0F / zero ) ? (String^)"true" : "false" );

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

// This will return true.
printfn $"IsPositiveInfinity(4.0F / 0) == {Single.IsPositiveInfinity(4f / 0f)}."

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

備註

浮點運算會返回 PositiveInfinity 以發出溢位條件的訊號。

另請參閱

• IsInfinity(Single)
• IsNegativeInfinity(Single)
• PositiveInfinity
• NegativeInfinity