PROGRAM
import factorial.*; import java.io.*; import java.lang.*; class cosseries { public static void main(String arg[]) { fact s=new fact(); double sum=1,r; int n; try { BufferedReader br=new BufferedReader(new InputStreamReader(System.in)); System.out.print("\nEnter the value of n :"); n=Integer.parseInt(br.readLine()); int k; for(k=2;k<=n;k+=2) { r=s.fa(k); sum=sum+1/r; } System.out.print("\nSum :"+sum); } catch(Exception e) { System.out.println(e); } } } package factorial; import java.io.*; public class fact { double f=1,num,i; public double fa(int no) { num=no; for(i=1;i<=num;i++) { f=1; f=f*i; } return(f); } } |
OUTPUT
Enter the value of n :10
Sum :2.141666666666667