평균 구하기

풀이 1

function solution20(arr) {
  return arr.reduce((acc, curr) => acc + curr) / arr.length;
}

console.log(solution20([1, 2, 3, 4])); // 2.5
console.log(solution20([5, 5])); // 5

풀이 2

function solution21(arr) {
  let avg = 0;

  for (let i = 0; i < arr.length; i++) {
    avg += arr[i] / arr.length;
  }
  return avg;
}

console.log(solution21([1, 2, 3, 4])); // 2.5
console.log(solution21([5, 5])); // 5