Texas Instruments TI-89 Manual

A SERVICE OF

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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 SubroutinesNotes 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