JavaScript: Get the median of an array of numbers

JavaScript fundamental (ES6 Syntax): Exercise-88 with Solution

Find Median of Numbers in Array

Write a JavaScript program to get the median of an array of numbers.

Note: Find the middle of the array, use Array.sort() to sort the values. Return the number at the midpoint if length is odd, otherwise the average of the two middle numbers.

• Find the middle of the array, use Array.prototype.sort() to sort the values.
• Return the number at the midpoint if Array.prototype.length is odd, otherwise the average of the two middle numbers.

Sample Solution:

JavaScript Code:

//#Source https://bit.ly/2neWfJ2
// Define the function 'median' to find the median value of an array.
const median = arr => {
  const mid = Math.floor(arr.length / 2),
    nums = [...arr].sort((a, b) => a - b);
  return arr.length % 2 !== 0 ? nums[mid] : (nums[mid - 1] + nums[mid]) / 2;
};

// Example usage:
console.log(median([5, 6, 50, 1, -5])); // Outputs: 5 (median of the array)
console.log(median([1, 2, 3, 4, 5])); // Outputs: 3 (median of the array)

Output:

5
3

Visual Presentation:

Flowchart:

Live Demo:

See the Pen javascript-basic-exercise-88-1 by w3resource (@w3resource) on CodePen.

For more Practice: Solve these Related Problems:

• Write a JavaScript program that calculates the median value of a numeric array after sorting it.
• Write a JavaScript function that handles both even and odd array lengths to return the median correctly.
• Write a JavaScript program that computes the median without fully sorting the array by using a selection algorithm.

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