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

### Tell us what’s happening:

the hint says " Your inner `for` loop should iterate through every element in the array except the last one." but i don’t know how to write it … i tried this “array[i-1]” but it didn’t work …

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

}
}
}
``````

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### Challenge Information:

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

Nevermind, i’ve solved it by accident haha, thanks~

1 Like

how do you solve it?

Hi @arifsyah1018
This thread is a little old by now. Could you post a new thread explaining what kind of problems you are having to solve it?

My problem is the same as his

If you post in a new thread, I am quite sure we can figure out how to help you.
Thank you.