C＃中的Single.IsPositiveInfinity()方法(带示例)

在C＃中， Single.IsPositiveInfinity(Single)是Single结构方法。此方法用于检查指定的浮点值是否为正无穷大。在某些浮点运算中，可以获得正无穷大的结果。例如：如果任何正值除以零，则结果为正无穷大。

Syntax: public static bool IsPositiveInfinity (float f);

Parameter:
f: It is a single-precision floating-point number of type System.Single.

返回类型：如果指定值的计算结果为正无穷大，则此函数返回布尔值True ，否则返回False 。

示例：演示Single.IsPositiveInfinity(Single)方法

// C# program to illustrate the
// Single.IsPositiveInfinity(Single)
// Method
using System;
  
class GFG {
  
    // Main method
    static public void Main()
    {
  
        // Dividing a Positive number by zero
        // results in positive infinity.
  
        // Dividing a number directly by 0
        // produces an error
        // So 0 is stored in a variable first
  
        float zero = 0.0f;
        float value = 10.0f;
        float result = value / zero;
  
        // Printing result
        Console.WriteLine(result);
  
        // Check result using IsPositiveInfinity() Method
        Console.WriteLine(Single.IsPositiveInfinity(result));
  
        // Floating point operation that exceeds
        // Single.MaxValue is Positive Infinity
        result = (1.402823E+38f + ((float)9.985e307));
  
        // Printing result
        Console.WriteLine(result);
  
        // Check result using IsPositiveInfinity() Method
        Console.WriteLine(Single.IsPositiveInfinity(result));
    }
}

输出：

Infinity
True
Infinity
True

注意：浮点操作返回PositiveInfinity以指示溢出条件。

参考：

• https://docs.microsoft.com/zh-cn/dotnet/api/system.single.ispositiveinfinity?view=netstandard-2.1