168. Excel Sheet Column Title

Practice Excel Sheet Column Title for free on NudgeCode: Easy, Array & Hash Table pattern. Write it in Python or JavaScript, run the tests in your browser, and ask for a hint when you are stuck.

Spreadsheet columns are labelled A, B, ..., Z, then AA, AB, ..., AZ, BA, and so on. Given a column number (starting at 1), return its label.

Example

columnNumber = 1    ->  "A"
columnNumber = 28   ->  "AB"
columnNumber = 701  ->  "ZY"

Constraints