Display sum of the series x!/10 + (x+2)!/15 + (x+4)!/20 + (x+n)!/100

Series program using BlueJ where a separate function is used to calculate factorial value.

The series is x!/10 + (x+2)!/15 + (x+4)!/20 + (x+n)!/100

import java.util.*;

class Search

{

    int x,c=10,n;

    double sum=0;

    int j=10;

    Scanner sc=new Scanner(System.in);

public void assign()

{   

System.out.print("\nEnter value of 'x': ");

x=sc.nextInt();

System.out.print("\nEnter value of 'n':");

n=sc.nextInt();

}

public void display()

{

    for(int i=0;i< =n;i=i+2)

    {

         sum=sum + fact(x+i)/(double)j;

    }

    System.out.println("\nSum of the series: "+sum);

}

 public int fact(int n)

 {

      int i,f=1;

      for(i=1;i< =n;i++)

      {

           f=f*i;

        }

        return f;

    }     

    public static void main(String args[])

    {

        Search ob=new Search();

        ob.assign();

        ob.display();

   }

 }

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