A scientific calculator that is text based in a repl like environment. You can create variables and call inbuilt functions like sin() etc.

I've found gui calculators slow to input numbers and I get confused with exponent input in gui calculators. I want a simple environment where you can write code with c like syntax. I also want to enter hex & binary and easily convert between them & do c like bitwise operations.

My stretch goals would be allowing numbers to keep track of the number of significant figures, uncertainty & units (like m/s). So calculations will keep track of these behind the scenes.