Texas Instruments TI-89 Voyage 200, User Manual

Page: 592 / 1008

Programming 592
An internal subroutine is called and executed in the same way as a separate program.
Ê
Declares the subroutine as a local variable.
Ë
Defines the subroutine.
Ì
Calls the subroutine.
Note:
Use the Program Editor’s
†
Var
toolbar menu to enter the Define and
Prgm...EndPrgm
commands.
Notes about Using Subroutines
Notes about Using Subroutines Notes about Using Subroutines
Notes about Using Subroutines
At the end of a subroutine, execution returns to the calling program. To exit a subroutine
at any other time, use the
Return
command.
A subroutine cannot access local variables declared in the calling program. Likewise, the
calling program cannot access local variables declared in a subroutine.
Ê
Ë
©
Ë
Ì
:subtest1()
:Prgm
:local subtest2
:Define subtest2(x,y)=Prgm
: Disp x,y
:EndPrgm
:
¦
Beginning of main program
:For i,1,4,1
: subtest2(i,I*1000)
:EndFor
:EndPrgm