The Hashtable class represents a collection of key-and-value pairs that are organized based on the hash code of the key. The key is used to access the items in the collection. Hashtable.Count Property is used to get the total number of the key/value pairs contained in the Hashtable.
Syntax:
myTable.Count
Here, myTable is the name of the Hashtable.
Below given are some examples to understand the implementation in a better way:
Example 1:
// C# code to get the number of key-and-value // pairs contained in the Hashtable. using System;
using System.Collections;
class GFG {
// Driver code
public static void Main()
{
// Creating a Hashtable
Hashtable myTable = new Hashtable();
// Adding elements in Hashtable
myTable.Add( "2" , "Even & Prime" );
myTable.Add( "3" , "Odd & Prime" );
myTable.Add( "4" , "Even & non-prime" );
myTable.Add( "9" , "Odd & non-prime" );
// To get the number of key-and-value
// pairs contained in the Hashtable.
Console.WriteLine(myTable.Count);
}
} |
Output:
4
Example 2:
// C# code to get the number of key-and-value // pairs contained in the Hashtable. using System;
using System.Collections;
class GFG {
// Driver code
public static void Main()
{
// Creating an empty Hashtable
Hashtable myTable = new Hashtable();
// To get the number of key-and-value
// pairs contained in the Hashtable.
Console.WriteLine(myTable.Count);
}
} |
Output:
0
Reference: