Texas Instruments TITANIUM TI-89 - Manual (Page 592)

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.
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: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