Understanding nested for loops in javascript

Question

I\'m learning JavaScript at the moment on freecodecamp and they have an example for nested for loops in one of their excercises:

 var arr = [[1,2], [3,4], [5,6]]         


        

Answer 1

Despite some caveats of using for-in loops on arrays, they can imo sometimes help to clear the mess in nested loops a bit:

var arr = [[1,2], [3,4],[5,6]];

for (i in arr){
      for (j in arr[i]){
        console.log(arr[i][j]);
      }
    }

Also code visualization can clarify execution!