JavaScript Answers

How to calculate median with JavaScript?

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To calculate median with JavaScript, we can sort the numbers and get the middle value.

For instance, we write

const median = (numbers) => {
  const sorted = Array.from(numbers).sort((a, b) => a - b);
  const middle = Math.floor(sorted.length / 2);

  if (sorted.length % 2 === 0) {
    return (sorted[middle - 1] + sorted[middle]) / 2;

  return sorted[middle];

console.log(median([4, 5, 7, 1, 33]));

to define the median function.

In it, we call sort on the copied numbers array after copying it with Array.from to sort the numbers in ascending order.

Then we check if the length of the sorted array is event.

We get the middle index by taking the floor of the length divided by 2.

If it is, then we take the average of the 2 middle numbers.

Otherwise, we return the middle number.

By John Au-Yeung

Web developer specializing in React, Vue, and front end development.

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