C#: Find out the sum of in A.P. series

C# Sharp For Loop: Exercise-49 with Solution

Write a C# Sharp program to find out the sum of the Arithmetic Progress series.

Sample Solution:-

C# Sharp Code:

using System;  // Importing necessary namespace

public class Exercise49  // Declaration of the Exercise49 class
{  
    public static void Main()  // Main method, entry point of the program
    {
        // Declaration of variables
        int n1, df, n2, i, ln;
        int s1 = 0;

        // Displaying information about finding the sum of an A.P. series
        Console.Write("\n\n");
        Console.Write("Find out the sum of an A.P. series:\n");
        Console.Write("-------------------------------------");
        Console.Write("\n\n");	

        // Prompting user to input the starting number, number of items, and common difference
        Console.Write("Input the starting number of the A.P. series: ");
        n1 = Convert.ToInt32(Console.ReadLine());	// Reading starting number

        Console.Write("Input the number of items for the A.P. series: ");
        n2 = Convert.ToInt32(Console.ReadLine());	// Reading number of items

        Console.Write("Input the common difference of the A.P. series: ");
        df = Convert.ToInt32(Console.ReadLine());	// Reading common difference

        // Calculating the sum of the arithmetic progression series using the formula
        s1 = (n2 * (2 * n1 + (n2 - 1) * df)) / 2;
        ln = n1 + (n2 - 1) * df;  // Calculating the last number in the series

        Console.Write("\nThe Sum of the A.P. series is: \n");  // Displaying the result

        // Loop to display the elements of the arithmetic progression series
        for (i = n1; i <= ln; i = i + df) 
        {
            // Displaying elements of the series with proper formatting
            if (i != ln)
                Console.Write("{0} + ", i);
            else
                Console.Write("{0} = {1} \n\n", i, s1);  // Displaying the last element and the sum
        }
    }
}

Sample Output:

Find out the sum of in A.P. series:                                                                         
-------------------------------------                                                                       
Input  the starting number of the A.P. series: 0                                                            
Input the number of items for  the A.P. series: 10                                                          
Input  the common difference of A.P. series: 5                                                              
The Sum of the  A.P. series are :                                                                           
0 + 5 + 10 + 15 + 20 + 25 + 30 + 35 + 40 + 45 = 225 

Flowchart:

C# Sharp Code Editor:

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