Question

write a java program to find the value of s s=1 +1+2/1*2 + 1+2+3/1*2*3 +1+2+3+4 /1*2*3*4 + …………………………………..1+2+3+4+………..n /1*2*3*4*………….n

Answer 1

Language:

JAVA

Program:

import java.util.Scanner;

public class Program

{public static void main(String[] args) {

Scanner scan = new Scanner (System.in);

int n = scan.nextInt();

double fin=0;

for(int i=1;i<=n;i++)

{ double pro =1;

double sum=0;

for (int j =1;j<=i; j++)

{ pro =j*pro;

sum = sum+ j; }

fin = fin + (sum/pro);}

System.out.println(fin); }}

Explanation:

• Take n as input
• Run a loop to get numbers for sum and products.
• Run a nested loop to get the sum of each term.
• Print the output.

Note: Please ensure datatype of set to double or you'll end up making the mistake I did.

Output:

For n = 4

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