HP 32SII - Manual (Page 193)

Programming Techniques 13–3
File name 32sii-Manual-E-0424
Printed Date : 2003/4/24 Size : 17.7 x 25.2 cm

   Starts here.

  "! %

 %
€ 1 Calls subroutine Q.

 !
 2 Return here.

 #$

!  Starts D again.
 
 1
Starts subroutine.
.
.
.
 !
€ 2 Returns to routines D.
Nested Subroutines
A subroutine can call another subroutine, and that subroutine can call yet
another subroutine. This "nesting" of subroutines—the calling of a subroutine
within another subroutine—is limited to a stack of subroutines seven levels
deep (not counting the topmost program level). The operation of nested
subroutines is as shown below:
MAIN program
(top level)
End of program
Attempting to execute a subroutine nested more than seven levels deep
causes an
% #  $ error.