Basic

10 print"Hello World!"
20 goto 10

submitted by: bronson@engr.latech.edu (Patrick Bronson)

Here's a Hello, World proggie in Atari Basic:

10 REM HELLO.BAS
20 POKE 764,255
30 PRINT "Hello World"
40 IF PEEK(764)=255 THEN GOTO 30

And why not let's use some of the cool sound and graphics features in the Atari, and available in Atari BASIC?

10 REM HELLOFX.BAS
15 REM Make sure we're in text mode:
20 GRAPHICS 0
25 REM Set the left and right margins
30 POKE 82,0:POKE 83,39
35 REM Clear last-key-pressed
40 POKE 764,255
45 REM Main Loop!
50 PRINT "Hello World!";
55 REM Change the text luminence
60 SETCOLOR 1,0,RND(0)*16
65 REM Change the background color
70 SETCOLOR 2,RND(0)*16,0
75 REM Play some whistle-like sound
80 SOUND 0,PITCH,10,10
85 REM Make it sound echoey by
86 REM adding a second, off-pitch
87 REM a little quieter...
90 SOUND 1,PITCH+3,10,5
95 REM Change the pithc:
100 PITCH=PITCH+1
110 IF PITCH=250 THEN PITCH=0
115 REM Keep going til keypress...
120 IF PEEK(764)=255 THEN 50
125 REM Eat keypress...
130 POKE 764,255

previous two submitted by: William Kendrick (nbs@sonic.net)