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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 pro
g
ram
(top level)
End of pro
g
ram
Attempting to execute a subroutine nested more than seven levels deep
causes an
%
#$
error.