In MATLAB I run in debugger mode very frequently, and it allows you to step inside functions, and query variables. When encapsulated within functions, it also a

In MATLAB I run in debugger mode very frequently, and it allows you to step inside functions, and query variables. When encapsulated within functions, it also allows variable assignment at the prompt. This is pretty useful when writing data munging or analysis scripts; in that case, the code in the editor is the running canonical copy, while the current running environment is exploratory in nature.