05. Average Number

function averageNumber(input) {
    let num = Number(input[0]);
    let index = 1;
    let sum = 0;

    while (index <= num) {
        sum += Number(input[index++]);
    }
    console.log(`${(sum / num).toFixed(2)}`);
}

РЕШЕНИЕ С FOR:

function averageNumber(input) {
    let num = Number(input[0]);
    let sum = 0;

    for (let i = 1; i <= num; i++) {
        let number = Number(input[i]);
        sum += number;
    }
    console.log(`${(sum / num).toFixed(2)}`);
}