yabasic - 1:2.90.5-1 main

Yabasic is a traditional basic-interpreter. It comes with goto and
various loops and allows one to define subroutines and libraries.
It does simple graphics and printing. Yabasic can call out to libraries
written in C and allows one to create standalone programs.
Yabasic runs under Unix and Windows and has comprehensive documentation;
it is small, simple, open-source and free.