C#: Display numbers, number*frequency and the frequency
Write a program in C# Sharp to display numbers, multiplication of numbers with frequency and the frequency of a number in an array.
Sample Solution:
C# Sharp Code:
using System;
using System.Linq;
using System.Collections.Generic;
class LinqExercise7
{
    static void Main(string[] args)
    {
        // Define an array containing integer numbers
        int[] nums = new int[] { 5, 1, 9, 2, 3, 7, 4, 5, 6, 8, 7, 6, 3, 4, 5, 2 };  
        // Display a message indicating the purpose of the LINQ operation
        Console.Write("\nLINQ : Display numbers, number*frequency and frequency : "); 
        Console.Write("\n-------------------------------------------------------\n");
        Console.Write("The numbers in the array are : \n");
        Console.Write("  5, 1, 9, 2, 3, 7, 4, 5, 6, 8, 7, 6, 3, 4, 5, 2 \n\n");
        // Group the array elements by their values and count occurrences
        var m = from x in nums  
                group x by x into y  
                select y;  
        // Display the headers for the output table
        Console.Write("Number"+"\t"+"Number*Frequency"+"\t"+"Frequency"+"\n");
        Console.Write("------------------------------------------------\n");
        // Display the number, its product with frequency, and frequency
        foreach (var arrEle in m)  
        {  
            Console.WriteLine(arrEle.Key + "\t" + arrEle.Sum() + "\t\t\t" + arrEle.Count());  
        }  
        Console.WriteLine();
    }
}
Sample Output:
LINQ : Display numbers, number*frequency and frequency : ------------------------------------------------------- The numbers in the array are : 5, 1, 9, 2, 3, 7, 4, 5, 6, 8, 7, 6, 3, 4, 5, 2 Number Number*Frequency Frequency ------------------------------------------------ 5 15 3 1 1 1 9 9 1 2 4 2 3 6 2 7 14 2 4 8 2 6 12 2 8 8 1
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