Array.sort()

const arr = [5, 4, 3, 2, 1]
arr.sort() // [1, 2, 3, 4, 5]

const arr2 = [30, 20, 10, 3, 2, 1]
arr2.sort() // [1, 10, 2, 20, 3, 30]

Array.sort((a, b) => a - b)

const arr = [30, 20, 10, 3, 2, 1]
arr.sort((a, b) => a - b) // [1, 2, 3, 10, 20, 30]