Thank you so much for your reply ! So I need to set breakpoints for Xcode to run in Debug mode ?

Thank you so much for your reply ! Good to know about the more updated versions ! The feature I was hoping to mimic is a feature in Visual Studio. I've included a link for reference. The instructor in the video begins describing a feature in Visual Studio that allows you to go through the code line by line to help you detect logical errors. Her description starts at 7:52 of this video ... https://www.youtube.com/watch?v=IggaDWx5tDU&t=628s