What's new ?

Version 2.92.1, July 20, 2026

• Bugfix in replace$

Version 2.92.0, July 19, 2026

• New function 'replace$' to replace substrings within a sring
• New peeks 'screenposx' and y to get cursor position

Version 2.91.4, August 31, 2025

• Fixed compile-warnings for missing prototypes
• Some minor updates in toolchain

Version 2.91.3, June 14, 2025

• Fixed a bug with 'print reverse' under windows.
• Documentation

Version 2.91.2, March 23, 2025

• New peeks 'displayheight' and 'displaywidth' to get the resolution of your monitor.
• Fix for option '--docu'

Version 2.91.1, January 24, 2025

• New pokes 'console_foreground_color' and 'console_background_color' to set the default fore- and background color for the console.
• The input-statement now supports the clauses at() and color().

Version 2.91.0, January 7, 2025

• New poke 'console_foreground_intensity' to change (once per run) the intensity of colored text printed with yabasic.
• New function string$ to multiply a string.

Yabasic in a Nutshell

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

To learn more about yabasic, you may view the Manual of yabasic, browse the faq or read its history or the log of changes and bugs.

Hello World

This is a simple hello-world.yab written in yabasic, complete with the resulting screenshot:

	clear screen
	print "Press 'q' to quit ..."
	label again
	print color("green") "Hello ";
	print color("blue") "World !   ";
	if (inkey$(1)="q") exit
	goto again