Keywords are the words in a language that are used for some internal process or represent some predefined actions. ulong is a keyword that is used to declare a variable which can store an unsigned integer value from the range 0 to 18,446,744,073,709,551,615. It is an alias of System.UInt64.
ulong keyword occupies 8 bytes (64 bits) space in the memory.
Syntax:
ulong variable_name = value;
Example:
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
Note:
- If we input number beyond the range, it shows error-
Integral constant is too large
- If we input wrong value for eg. -34, it shows error-
Constant value `-34' cannot be converted to a `ulong'
// 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 ));
}
} |
Output:
num: 223 Size of a ulong variable: 8
Example 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();
}
} } |
Output:
Type of num: System.UInt64 num: 0 Size of a ulong variable: 8 Min value of ulong: 0 Max value of ulong: 18446744073709551615
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