Specifications

Commands - 101
RETURN
Statement
SYNTAX: RETURN [line/label]
RETURN ITR number
PURPOSE: To resume execution after a GOSUB, interrupt, multitasking or communications call. The RETURN
ITR reenables the interrupt.
REMARKS: RETURN is used as a return from a GOSUB call. Program execution continues at the statement
following the GOSUB.
number is 0 or 1, or as limited by your hardware. It is the interrupt number that the subroutine
declared by ON ITR n declared.
If the optional line/label is specified, the program will branch to the specified line/label.
RETURN ITR is used as a return from an ON ITR GOSUB declaration. In this case the return is to
the next statement where the interrupt occurred. The hardware interrupt is reenabled. If ITR number
is left off, the return is still to the next statement where the interrupt occurred. However, interrupt
number is disabled until a RETURN ITR number is executed or ON ITR GOSUB is declared again.
This is useful when you want to recognize an interrupt once and enable it again at some later time.
RELATED: GOSUB, ON ITR
EXAMPLE: 10 ON ITR 0 GOSUB 40
20 A=23 : 'This is a dummy loop
30 GOTO 20
40 PRINT "Interrupt"
50 RETURN ITR 0
ERROR: <RETURN w/o GOSUB> – if no corresponding GOSUB
<Can’t compile> – if line/label does not exist
<Data out of range> - if number is not 0 or 1 when used with ITR
<Expected (> - if number is missing when used with an ITR