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