Return Largest Number In An Array

LargestNumberInArray.js

// Return an array consisting of the largest number from each provided sub-array. For simplicity, the provided array will contain  4 sub-arrays.

function largestOfFour(arr) {
  let largestNumber = [0,0,0,0];
  for(var i=0; i < arr.length; i++) {
    for(var j=0; j < arr[i].length; j++) {
      if(arr[i][j] > largestNumber[i]) {
        largestNumber[i] = arr[i][j];
      }
    }
  }
  return largestNumber;
}



console.log(largestOfFour([[4, 5, 1, 3], [13, 27, 18, 26], [32, 35, 37, 39], [1000, 1001, 857, 1]]));
console.log(largestOfFour([[13, 27, 18, 26], [4, 5, 1, 3], [32, 35, 37, 39], [1000, 1001, 857, 1]]));
console.log(largestOfFour([[4, 9, 1, 3], [13, 35, 18, 26], [32, 35, 97, 39], [1000000, 1001, 857, 1]]));