C＃中的long关键字

关键字是用于某些内部过程或表示某些预定义动作的语言中的单词。 long是用于声明变量的关键字，该变量可以存储从-9,223,372,036,854,775,808到9,223,372,036,854,775,807范围内的有符号整数值。它是System.Int64的别名。

句法：

long variable_name = value;

long关键字在内存中占用8个字节(64位)的空间。

例子：

Input: num: 34638

Output: num: 34638
        Size of a long variable: 8

Input: num = -79349367648374345

Output: Type of num: System.Int64
        num: -79349367648374345
        Size of a long variable: 8

如果我们输入的数字超出范围，则会显示错误-

Integral constant is too large

范例1：

// C# program for long keyword
using System;
using System.Text;
  
class GFG {
  
    static void Main(string[] args)
    {
        // variable declaration
        long num = 34638;
  
        // to print value
        Console.WriteLine("num: " + num);
  
        // to print size
        Console.WriteLine("Size of a long variable: " + sizeof(long));
    }
}

输出：

num: 34638
Size of a long variable: 8

范例2：

// C# program for long keyword
using System;
using System.Text;
  
namespace Test {
  
class GFG {
  
    static void Main(string[] args)
    {
        // variable declaration
        long num = -79349367648374345;
  
        // to print type of variable
        Console.WriteLine("Type of num: " + num.GetType());
  
        // to print value
        Console.WriteLine("num: " + num);
  
        // to print size
        Console.WriteLine("Size of a long variable: " + sizeof(long));
  
        // to print minimum & maximum value of long
        Console.WriteLine("Min value of long: " + long.MinValue);
        Console.WriteLine("Max value of long: " + long.MaxValue);
  
        // hit ENTER to exit
        Console.ReadLine();
    }
}
}

输出：

Type of num: System.Int64
num: -79349367648374345
Size of a long variable: 8
Min value of long: -9223372036854775808
Max value of long: 9223372036854775807