Common Lisp has complex numbers: https://lispcookbook.github.io/cl-cookbook/numbers.html#complex-types https://lispcookbook.github.io/cl-cookbook/numbers.html#c

Common Lisp has complex numbers: https://lispcookbook.github.io/cl-cookbook/numbers.html#complex-types https://lispcookbook.github.io/cl-cookbook/numbers.html#comp... Is stack-free function calling equivalent to tail call optimization? If so, then many CL implementations support it, including SBCL. For Scheme, it’s part of the standard.