You are working in a REPL, starting with small expressions to verify they are roughly doing what you want and then composing them to build up until you can plug it all together and now have a formula you can plug into the calculator to plug and chug all the rest of your data.

So in that sense yeah it does kind of replicate the magic of the first time you got a complex equation or BASIC program to run on your TI back in your school days.

if you don't mind sharing: how did your own first working program felt like, and what was it written in?

by the way, did it work, or did it work correctly? it's a small but important distinction.