C#: Display the number and frequency of number from given array

C# Sharp LINQ : Exercise-4 with Solution

Write a program in C# Sharp to display the number and frequency of a given number from an array.

Sample Solution:

C# Sharp Code:

using System;
using System.Linq;
using System.Collections.Generic;

class LinqExercise4
{
    static void Main(string[] args)
    {
        // Define an integer array
        int[] arr1 = new int[] { 5, 9, 1, 2, 3, 7, 5, 6, 7, 3, 7, 6, 8, 5, 4, 9, 6, 2 };  

        // Display a message indicating the purpose of the LINQ operation
        Console.Write("\nLINQ : Display the number and frequency of number from given array : \n"); 
        Console.Write("---------------------------------------------------------------------\n");
        Console.Write("The numbers in the array are : \n");
        Console.Write(" 5, 9, 1, 2, 3, 7, 5, 6, 7, 3, 7, 6, 8, 5, 4, 9, 6, 2\n");
			
        // Group the array elements by their values and count occurrences
        var n = from x in arr1  
                group x by x into y  
                select y;  

        // Display the number and its frequency of occurrence
        Console.WriteLine("\nThe number and the Frequency are : \n"); 
        foreach (var arrNo in n)  
        {  
            Console.WriteLine("Number " + arrNo.Key + " appears " + arrNo.Count() + " times");  
        } 

        Console.WriteLine("\n"); // Add newline for formatting				
    }
}

Sample Output:

LINQ : Display the number and frequency of number from given array :                                          
---------------------------------------------------------------------                                         
The numbers in the array  are :                                                                               
 5, 9, 1, 2, 3, 7, 5, 6, 7, 3, 7, 6, 8, 5, 4, 9, 6, 2                                                              
The number and the Frequency are :                                                                            
Number 5 appears 3 times                                                                                      
Number 9 appears 2 times                                                                                      
Number 1 appears 1 times                                                                                      
Number 2 appears 2 times                                                                                      
Number 3 appears 2 times                                                                                      
Number 7 appears 3 times                                                                                      
Number 6 appears 3 times                                                                                      
Number 8 appears 1 times                                                                                      
Number 4 appears 1 times 

Visual Presentation:

Flowchart:

C# Sharp Code Editor:

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