Double.IsFinite()方法用于检查double值是否超出范围。

用法： public static bool IsFinite (double value);

返回值：如果值是有限的，则此方法返回true，否则返回false。

下面的程序说明Double.IsFinite()方法的使用：

示例1:

// C# program to demonstrate the

// Double.IsFinite() Method

using System;

using System.Globalization;

class GFG {

// Main Method

public static void Main()

{

// Declaring and initializing value1

double value1 = 10d;

// using IsFinite() method

bool value = Double.IsFinite(value1);

// Displaying the result

if (value)

Console.WriteLine("{0} is finite", value1);

else

Console.WriteLine("{0} is not finite", value1);

}

}

输出：

10 is finite

示例2:

// C# program to demonstrate the

// Double.IsFinite() Method

using System;

using System.Globalization;

class GFG {

// Main Method

public static void Main()

{

// Declaring and initializing value1

double value1 = Math.Pow(2, 1000000000000);

// using IsFinite() method

bool value = Double.IsFinite(value1);

// Displaying the result

if (value)

Console.WriteLine("{0} is finite", value1);

else

Console.WriteLine("{0} is not finite", value1);

}

}

输出：

Infinity is not finite