Question

How to find the sum of Fibonacci series in java?​

Answer 1

import java.util.*;
public class Fibonacci
{
public static void main(String args[ ])
{
Scanner s=new Scanner(System.in);
System.out.print("Enter no. of terms:");
int n=s.nextInt();
int i, k1=0,k2=1,sum=0;
for(i=1;i<=n;i++)
{
System.out.print(k1+"+");
sum=k1+k2;
k1=k2;
k2=sum;
}
System.out.print("\n Sum is "+ sum);
}
}
Output: Enter no. of terms: ...
0+1+1+2+3+5.....+n
Sum is .....

Answer 2

Answer:public class fibonacci_series

{

public static void main(int n)

{

int a=0;

int b=1;

int s=0;

int c=0;

int i;

s=s+a+b;

System.out.print("The fibonacci series = "+a+","+b+",");

for(i=3;i<=n;i++)

{

c=a+b;

System.out.print(c+",");

a=b;

b=c;

s=s+c;

}

System.out.println("upto "+n+" terms completed");

System.out.println("\nThe sum of the fibonacci series upto "+n+" terms = "+s);

}

}

Explanation: