Learn Basic Algorithmic Thinking by Building a Number Sorter - Step 15

Tell us what’s happening:

Instructions state: “Because you need to compare elements, you’ll need to use a nested for loop. This loop should iterate through every element in the array except the last one. Use j as your inner loop’s iterator variable.”

With the following code, I’m getting the error message " Your inner for loop should iterate through every element in the array except the last one."

I’m very confused because from what I understand, the code I’ve written should do exactly that: increment j until array.length - 1, i.e. every element in the array except the last element in the array. I don’t get it.

Your code so far

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const bubbleSort = (array) => {
  for (let i = 0; i < array.length; i++) {
    for (let j = 0; j < (array.length - 1); j++) {}
  }
}

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Challenge Information:

Learn Basic Algorithmic Thinking by Building a Number Sorter - Step 15

This looks right to me too. Try it without the parentheses in your compare argument. I think this is a case of the tests not accounting for valid variations in code.

1 Like

Wow, that worked. Unbelievable!