... execute line by line. No setup, no breakpoints just paste and run. Try it out! What it does - Paste a function (or plain code) and it runs step by step - Variables are tracked and displayed at every step - Arrays are shown as a grid with per-cell change highlighting - Recursive functions are visualized as a call tree - Parameters are auto-detected just fill in the values and hit run Quick example Paste this Python code: def bubble_sort ... ... return arr Enter [5, 3, 8, 1, 2] as the argument, hit run, and step through the execution. You'll see exactly how the array