Average Number

function averageNumber(input) {
    let index = 0;
    let n = Number(input[index]);
    index++;
    let sum = 0;
    for (let i = 1; i <= n; i++) {
       sum += input[index];
       index++;
    }
    let avgSum = sum / n;
    console.log(avgSum.toFixed(2));
}

averageNumber([4,
    3,
    2,
    4,
    2]);