Yabasic

Yabasic (Yet Another BASIC) is an interpreter program for a version of BASIC. BASIC is a programming language. BASIC was designed by John George Kemeny and Thomas Kurtz, in 1964. Yabasic was born in 1995, 32 years later. Pedro Sá and Thomas Larsen are now developing version 3 of Yabasic. Yasbic is very compact at about 250 kilobytes total length.

How it works
To write something on the monitor, like Hello World, type print then "YOUR TEXT HERE".
 Print "Hello World"

Study this bit of code:
 10 beep
 20 wait 1
 30 goto 10
The result of this code is:
An audible beep is generated
The program waits for 1 second before going onto the next instruction
It then goes back to the start of the program creating an infinite loop.

This programming language can also be used to create rather complex programs such as one that calculates prime numbers

 print "This program will calculate the prime numbers below the limit"
 input "limit: " limit
 n=2
 do
   for i=2 to sqrt(n)
     if (frac(n/i)=0) then
       notprime=1
       break
     endif
   next i
   if notprime<>1 then
     print n
   endif
   notprime=0
   n=n+1
   if n>limit break
 loop

The "input" command asks the user to input a value which in this case is number that tells the program what number to stop finding prime numbers at.
The 
 do...loop
commands create a loop that can be repeated infinitely.
The
 for...next
commands hold instructions as to what the program is to do while in the loop. 
The
 if...endif
commands tell the program to look for something and if the thing it is looking for is there then it reports back that it is there.Tutorial on how to create UDTs in Yabasic 3  www.basicprogramming.org
Yabasic::Dev Article Future of Yabasic  www.basicprogramming.orgAnnouncement: Yabasic 3 beta release (2.9.5)  Thomas H. Larsen, via basicprogramming.org forum, 26 November 2009, forum.basicprogramming.org
Wiki of the developer team for Yabasic 3  www.basicprogramming.org

Related pages
 List of programming languages

References

Other websites
 Official Yabasic website — downloads and documentation for Yabasic 2.763.
 Yabasic 3 website  - downloads and documentation for the Version 3 interpreter.
 Yabasic manual — documentation for the interpreter.
 YAB interpreter — BeOS/Haiku version of Yabasic.
 Yabsic PS2  — site about the PS2 version.
 Small collection of Yabasic programs .
 Official website of flyab.

Category:Computer programming
Category:Programming languages