Sometimes it's just easier. Especially if you have a nice incremental build system or an interpreter to which you can just send expressions and definitions and

Sometimes it's just easier. Especially if you have a nice incremental build system or an interpreter to which you can just send expressions and definitions and see the results. Edit: also, you don't need to remember to weed out debug prints, you can, in almost all languages, define a function or a macro to do that which can be undefined or an ignore function if not built in debug mode. With cpp or Lisp, that'd be a compile time decision, and I suppose many languages could optimise out a function that is defined to just ignore it's arguments and do nothing.