I like qalc (https://github.com/Qalculate/libqalculate https://github.com/Qalculate/libqalculate) as a command-line calculator. It has all the basic repl featur

I like qalc (https://github.com/Qalculate/libqalculate https://github.com/Qalculate/libqalculate) as a command-line calculator. It has all the basic repl features, but also excellent units support and other useful math-oriented things.