In vscode when you step to the next statement it highlights in the left pane the variables that change. Something like that. It's useful for a beginner e.g in

In vscode when you step to the next statement it highlights in the left pane the variables that change. Something like that. It's useful for a beginner e.g in a for loop to see how `i` changes at the end of the loop. And similarly with return values of functions and so on.