Question

Write the program in Java to find the sum of the following series: 

S = 1 + (1 * 2) + (1 * 2 * 3) + ....................... + (1 * 2 * 3 * .......... * n)

Answer 1

import java.util.*;
public class Q2d
{public static void main(String arg{])
{int n, fact, sum = 0;
Scanner obj = new Scanner(System.in);
System.out.println("Enter the value of n....no. of terms");
n = obj.nextInt();
for (int i = 1; i <= n; i++)
{fact = 1; // reset to zero for each value of i
for (int j = 1; j <= i; j++)
fact = fact * j; // if i = 4, tmp = (1 * 2 * 3 * 4)
sum = sum + fact;
}
System.out.printIn("Sum of the Series = " + sum);
}}