WAP in java to print the sum of all the factorials of number between 1 to 10.
Answers
Answer:
Explanation:
Here, we are implementing a java program that will read the value of N and find sum of the factorials from 1 to N. It is a solution of series 1! + 2! + 3! + 4! + ... N! in java.
Submitted by Chandra Shekhar, on January 06, 2018
Given N and we have find the solution of series 1! + 2! + 3! + 4! + ... N! using Java program. (Sum of the factorials from 1 to N).
Example:
Input: 3
Output: 9
Explanation:
1! + 2! + 3! = 1 + 2 + 6 = 9
Input: 5
Output: 152
Explanation:
1! + 2! + 3! + 4! + 5!
= 1+2+6+24+120
= 153
Answer:
input:
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);
}
}
Explanation:
output:
First run:
Enter number : 3
Sum : 9
Second run:
Enter number : 5
Sum : 153