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。 ulong是一个关键字,用于声明一个变量,该变量可以存储从0到18,446,744,073,709,551,615范围内的无符号整数值。它是System.UInt64的别名。
ulong关键字在内存中占用8个字节(64位)的空间。
句法:
ulong variable_name = value;
例子:
Input: num: 223
Output: num: 223
Size of a ulong variable: 8
Input: num = 0
Output: Type of num: System.UInt64
num: 0
Size of a ulong variable: 8
笔记:
- 如果我们输入的数字超出范围,则会显示错误-
Integral constant is too large
- 如果我们输入错误的值,例如。 -34,它显示错误-
Constant value `-34' cannot be converted to a `ulong'
范例1:
// C# program for ulong keyword
using System;
using System.Text;
class Prog {
static void Main(string[] args)
{
// variable declaration
ulong num = 223;
// to print value
Console.WriteLine("num: " + num);
// to print size
Console.WriteLine("Size of a ulong variable: " + sizeof(ulong));
}
}
输出:
num: 223
Size of a ulong variable: 8
范例2:
// C# program for ulong keyword
using System;
using System.Text;
namespace Test {
class Prog {
static void Main(string[] args)
{
// variable declaration
ulong num = 0;
// 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 ulong variable: " + sizeof(ulong));
// to print minimum & maximum value of ulong
Console.WriteLine("Min value of ulong: " + ulong.MinValue);
Console.WriteLine("Max value of ulong: " + ulong.MaxValue);
// hit ENTER to exit
Console.ReadLine();
}
}
}
输出:
Type of num: System.UInt64
num: 0
Size of a ulong variable: 8
Min value of ulong: 0
Max value of ulong: 18446744073709551615