Mean

easycodingJavaScriptArraysMath~10 min

Asked at Google, Meta, Amazon

Overview

Implement mean(array) that returns the arithmetic mean of all numbers.

Constraints

Input contains only numbers.
Return 0 for empty array.

Examples

mean([1, 2, 3]); // 2
mean([1, 5, 3, 7]); // 4

Solution

Reveal solution

function mean(array) {
  if (array.length === 0) return 0;
  return array.reduce((s, n) => s + n, 0) / array.length;
}

mean.js

Mean

easycodingJavaScriptArrays

Overview

Implement mean(array) that returns the arithmetic mean of all numbers.

Constraints

Input contains only numbers.
Return 0 for empty array.

Examples

mean([1, 2, 3]); // 2
mean([1, 5, 3, 7]); // 4

Solution

Reveal solution

function mean(array) {
  if (array.length === 0) return 0;
  return array.reduce((s, n) => s + n, 0) / array.length;
}

NameTopicDifficulty

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