TI-81 & TI-85 Graphing Calculators

TI-81

PROG2:HELLOR
:Lbl 1
:Disp "HELLO WORLD"
:Goto 1


TI-85

PROGRAM:HELLO
:Lbl A
:Disp "Hello World!"
:Goto A

another more interesting TI-85 version:

Program:HelloB
:ClLCD
:Dec
:1`R:1`C:1`RD:1`CD
:Lbl START
:R`R1:C`C1
:Outpt(R,C,"Hello World!")
:R+RD`R:C+CD`C
:If (R==1) or (R==8)
:Then
:-1*RD`RD
:End
:If (C==1) or ((C+11)==21)
:Then
:-1*CD`CD
:End
:Outpt(R1,C1,"            ")
:Goto START

Note: The ` is the TI-85 store key and the "            " is 12 spaces.