Hi, Im a pretty decent matlab and maple user and now Im starting to use mathematica, because I've heard good things about it. I had some simple questions about it that I was hoping someone could answer. 1.) What is the best way to store data in mathematica? Do people use matricies like in matlab, or is there some better way. 2.) How does indexing work? 3.) Is there some sort of way to get a 'command line' to try out commands before using them in your script? If anyone could help me out with these questions I would appreciate it grealty. Also sorry if htese are bad questions, like i said, im a beginner.