Find the Largest Numbers in a Group of Arrays code example

Example: rite a function that takes in an array of numbers and outputs the maximum number.

function largestOfFour(arr) {
  return arr;
}
largestOfFour([[4, 5, 1, 3], [13, 27, 18, 26], [32, 35, 37, 39], [1000, 1001, 857, 1]]);