Return Largest Numbers in Arrays. What is wrong with code?

JavaScript
1

Tell us what’s happening:

Your code so far


function largestOfFour(arr) {
  // You can do this!
var longest = 0;
	for(var i =0;i<arr.length;i++){
		for(var a=0;a<arr[i].length;a++){
				if(arr[i][a] > longest){
					longest = arr[i];			
				}
			}
      	return longest;
	}

}


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

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User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/67.0.3396.99 Safari/537.36.

Link to the challenge:
https://learn.freecodecamp.org/javascript-algorithms-and-data-structures/basic-algorithm-scripting/return-largest-numbers-in-arrays

2

your code looks for a number bigger than 0 when it finds it, (eg. it finds the first ‘4’ in the first sub-array), it takes the whole sub array of [4,5,1,3] and assigns it to longest.

This doesn’t fulfill the requirement of the challenge.
The challenge wants you to search each array for the biggest number. For eg. [4,5,1,3] has the biggest number of 5
once you find each big number in each array, create a new array of all the big numbers…