Difference between cas vs non-cas programming

[Thomas_Sch]

XCAS ist the "base" of the CAS-system in the Prime.
(1) https://en.wikipedia.org/wiki/Xcas
(2) Website: http://www-fourier.ujf-grenoble.fr/~parisse/giac.html
(3) chapter about Gias/Xcas on the Prime:
http://www-fourier.ujf-grenoble.fr/~pari...tml#hprime

You can download XCAS also for your PC, e.g. Windows (or use in directly in the browser).
XCAS can be used interactively, and it can be programmed, these are (X)CAS-programs.
From the site mentioned above: "Programmation :
functions, local variables, tests, loops. Choice of syntax (C-like, Maple, Mupad, TI89). It is sometimes possible to run a Maple, MuPAD or TI89 without user intervention inside Xcas. Program editor. Interactive debugger. "

XCAS commands in english:
http://www-fourier.ujf-grenoble.fr/~pari...cascmd_en/

HTH