Hello World

10 PRINT "Hello World!"

Examples

Sample 1: Unstructured original BASIC (Applesoft BASIC)

Sample 2: Modern Structured BASIC (e.g. QBASIC)

10 INPUT "What is your name: "; U$ 20 PRINT "Hello "; U$ 25 REM 30 INPUT "How many stars do you want: "; N 35 S$ = "" 40 FOR I = 1 TO N 50 S$ = S$ + "*" 55 NEXT I 60 PRINT S$ 65 REM 70 INPUT "Do you want more stars? "; A$ 80 IF LEN(A$) = 0 GOTO 70 90 A$ = LEFT$(A$, 1) 100 IF (A$ = "Y") OR (A$ = "y") THEN GOTO 30 110 PRINT "Goodbye "; 120 FOR I = 1 TO 200 130 PRINT U$; " "; 140 NEXT I 150 PRINT

INPUT "What is your name"; UserName$ PRINT "Hello "; UserName$ DO INPUT "How many stars do you want"; NumStars Stars$ = "" Stars$ = REPEAT$("*", NumStars) ' <- ANSI BASIC --or-- Stars$ = STRING$(NumStars, "*") ' <- MS BASIC PRINT Stars$ DO INPUT "Do you want more stars"; Answer$ LOOP UNTIL Answer$ <> "" Answer$ = LEFT$(Answer$, 1); LOOP WHILE UCASE$(Answer$) = "Y" PRINT "Goodbye "; FOR I = 1 TO 200 PRINT UserName$; " "; NEXT I PRINT

Dialects

Nowadays there exist 31 dialects of BASIC

• Altair BASIC (MITS Altair, S-100; Microsoft's first product)

• Amiga BASIC (Commodore Amiga)

• AMOS BASIC (Commodore Amiga)

• Apple Business BASIC (Apple ///)

• Applesoft BASIC (Apple II)

• ASIC (MS-DOS)

• Atari 2600 Basic Programming (Atari 2600 video game console)

• Atari BASIC (aka Sheperdson BASIC) (Atari 8-bit family)

• Atari Microsoft BASIC II (Atari 8-bit family)

• B32 Business Basic (Data General Eclipse MV, UNIX, MS-DOS)

• BASIC09 (OS-9 and OS-9 68K on Motorola 6809 and 68K CPUs, respectively)

• BASICA (Advanced BASIC, available in ROM on IBM PCs) (later disk based versions for PC-DOS)

• BASIC A+ (Atari 8-bit family)

• BASIC-E (aka 'submarine BASIC') (CP/M)

• Basic Plus (DEC, for the RSTS/E OS, PDP-11 processor)

• BASIC XE (Atari 130XE)

• BBC BASIC (Acorn/BBC Micro, RISC OS, Tiki 100, Cambridge Z88, CP/M, MS-DOS)

• Blitz BASIC (Win32, Commodore Amiga)

• Business Basic

• Bxbasm (Win32, open source, native compile)

• Bywater BASIC (aka bwBASIC) (MS-DOS, POSIX)

• Caché Basic (One of the two scripting languages in Caché Database)

• CBASIC (successor of BASIC-E) (CP/M, MS-DOS)

• Chipmunk Basic (Apple Macintosh, CLI ports for Win32, GNU/Linux; copyrighted freeware)

• Color BASIC (Tandy Radio Shack TRS-80 Color Computer, aka CoCo)

• Commodore BASIC (Commodore 8-bit family)

• DarkBASIC & DarkBASIC Professional

• Dartmouth BASIC (see also True BASIC)

• Data General Business Basic (Data General Nova and later DG minicomputers)

• Ethos Basic (MS Windows)

• Extended Color BASIC (TRS-80 Color Computer)