Answer:
import java.io.*;
import java.util.Scanner;
class Odd {
public static void main (String[] args) {
Scanner ele=new Scanner(System.in);//creating a scanner object.
int n,sum=0;//declaring n and sum and initializing sum with 0.
n=ele.nextInt();//taking input of the n.
int [] arr =new int[n];//declaring an array arr.
for(int i=0;i<n;i++)
{
arr[i]=ele.nextInt();//taking input of the array.
}
for(int i=0;i<arr.length;i++)
{
if(i%2!=0)//adding to the if index is odd.
{
sum+=arr[i];
}
}
System.out.println(sum);
}
}
Input:-
6
1 2 3 4 5 6
Output:-
12
Explanation:
First I have created an a scanner object ele. I have taken two integers n and sum, n for number of array elements and sum for calculating the sum of odd indexed elements hence initializing it with 0.Then I have created an array named arr.Then taking the input of the n and array elements.Then looping over the array and calculating the sum.
