Question

How to sort numbers in ascending order (from the smallest to the largest number. E.g. 5, 9, 13) and descending order (from the largest to the smallest number. E.g. 13, 9, 5) in JavaScript?

Answer 1

The code below is for the ascending order:

function sortNums(arr) {
    let sorted = arr.sort((a, b) => a - b);
    console.log(sorted.join(", "));
}

sortNums([4, 15, -1, 0]);

... and this is for the descending order:

function sortNums(arr) {
    let sorted = arr.sort((a, b) => b - a);
    console.log(sorted.join(", "));
}

sortNums([4, 15, -1, 0]);

with lambda function. See how to use arrow (lambda) functions here

Answer 2

Another task with sorting in JavaScript: https://forum.tutorials7.com/2198/sort-array-task-with-advanced-javascript-functions