Question

Jav program to print the series 1!+2!+3!+4!.....n!

Answer 1

import java.util.Scanner;

 

public class SumOfFactorial

{

public static void main(String[] args)

{

 // create scanner class object.

 Scanner sc = new Scanner(System.in);

 

 // enter the number.

 System.out.print("Enter number : ");

 int n = sc.nextInt();

 

 int total=0;

 

 int i=1;

 

 // calculate factorial here.

 while(i <= n)  

 {

  int factorial=1;

  int j=1;

   

  while(j <= i)  

  {

   factorial=factorial*j;

   j = j+1;

  }

  // calculate sum of factorial of the number.

  total = total + factorial;

  i=i+1;

 }

 // print the result here.

 System.out.println("Sum : " + total);

}

}

Answer 2

Explanation:

class sum

{

p.s.v.m.(int n)

{

int i,s=0,j,f;

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

{

f=1;

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

{

f=f*j;

}

s=s+f;

}

S.o.pln("the sum " +s)

}

}