A realtime interpreter is where you can type in each line of the script separately and it will instantly be evaluated before you can type in the next line. It is good for testing purposes when you want to set something that is only a few lines or you just want to mess around with the interpreter.
Thanks helios very much, I'll do some research but perhaps I cannot apply this for my intepreter...Because skimmed quickly its conditions and requirements are not fit :(
Catfish - I'll come back later... But it seems the video you mentioned is very insteresting!
EssGeEich - Yes, thank you for your great idea. I should build up macro feature instead of using only linear search method :)
L B - Thank you, now I understand. Completely this is a new idea. But, is this possible????????
??? Yes, I know them, but the question " And where can I use them?". I asked this just because I want to know more information (probably they may be great features and I'll add them into my interpreter) :)