odd even sum

function oddEvenSum(input) {
    let n = Number(input[0]);
    let oddSum = 0;
    let evenSum = 0;
    for (let i = 1; i <= n; i++) {
        let num = Number(input[i]);
        if (i % 2 == 0) {
            evenSum += num;
        } else {
            oddSum += num;
        }
    }
    let diff = Math.abs(evenSum - oddSum);
    if (diff == 0) {
        console.log("Yes\nSum = " + evenSum);
    } else {
        console.log("No\nDiff = " + diff);
    }
}

oddEvenSum([4, 10, 50, 60, 20]);