Java Programs Made Easy

Q)... Sum of fibonaaci series upto given input.
sum of first 3 
logic:1+1+2
output:4

1. package Set1;
2. import java.util.*;
3. public class ClassSet6 {
4.  public static int sumOfFibonacci(int n){
5.   int a=-1,b=1,c=0,d=0;
6.   for(int i=0;i<=n;i++){
7.    c=a+b;
8.    a=b; b=c;
9.    d+=c;
10.   }
11.   return d;
12.  }
13.  public static void main(String[] args) {
14.   Scanner s=new Scanner(System.in);
15.   int n=s.nextInt();
16.   System.out.println(sumOfFibonacci(n));
17.  }
18. }