program to print sum of series in C using loops

C# program to print sum of series

Program Statement:

Write a program to display the sum of the following series using loop.

1*x + 2*x2 + 3*x3 + 4*x4 + 5*x5 + … + n*xn

Solution:

 static void Main(string[] args)
 {
 int j, n = 1, x, lastn, sum = 0, prod = 1;
 Console.WriteLine("Enter last digit:");
 lastn=Convert.ToInt32(Console.ReadLine());
 Console.WriteLine("Enter value of x:");
 x = Convert.ToInt32(Console.ReadLine());
 for (j = 1; j <= lastn; j++)
 {
 n = n * x;
 prod = n * j;
 sum = sum + prod;
 }
 Console.WriteLine("Sum of Series 1*x + 2*x2 + 3*x3 + 4*x4 + 5*x5 + … + n*xn when n=: " + n +" and x= "+ x+ "sum= "+ sum);
 Console.ReadLine();
 }
 

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