Yabasic (Yet Another BASIC interpreter) implements the most common and simple elements of the basic language; It comes with goto/gosub, with various loops, with user defined subroutines and Libraries. Yabasic is small (around 200KB) and free.
~# apt-get update ~# apt-get install yabasic
This is the "Hello world !" source code example.
print "Hello world !"
Save it with in hello.yab then run it typing:
~# yabasic hello.yab Hello world !