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73 lines
1.7 KiB
Text
73 lines
1.7 KiB
Text
'''RETURN''' is used in [[GOSUB]] procedures to return to the original call code line or a specified line label.
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{{PageSyntax}}
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:: '''RETURN''' [{''linelabel''|''linenumber''}]
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{{PageParameters}}
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* RETURN without parameters returns to the code immediately following the original [[GOSUB]] call.
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* ''line number'' or ''linelabel'' after the RETURN statement returns code execution to that label.
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''Usage:''
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* Normally required at the end of a [[GOSUB]] procedure unless the procedure returns using a loop.
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* RETURN is not used in error handling procedures. Error procedures use [[RESUME]] ''line number'' or [[RESUME|RESUME NEXT]].
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* GOSUB procedures use line numbers or line labels designated with a colon after the number or label.
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* If RETURN is encountered without a previous [[GOSUB]] call a [[ERROR Codes|"RETURN without GOSUB" error]] is produced.
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* To avoid errors, place [[GOSUB]] procedures AFTER the main program code [[END]] or after an [[EXIT SUB]] or [[EXIT FUNCTION]] call.
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''Example 1:'' Returns after a Gosub.
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{{CodeStart}}
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{{Cl|FOR...NEXT|FOR}} a = 1 {{Cl|TO}} 10
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{{Cl|PRINT}} a
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{{Cl|IF...THEN|IF}} a = 5 {{Cl|THEN}} {{Cl|GOSUB}} five
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{{Cl|NEXT}}
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{{Cl|END}} 'END or SYSTEM stop the program before the execution of a sub procedure
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five:
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{{Cl|PRINT}} "Aha! Five!"
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{{Cl|RETURN}} '' ''
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{{CodeEnd}}
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{{OutputStart}}
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1
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2
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3
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4
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5
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Aha! Five!
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6
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7
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8
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9
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10
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{{OutputEnd}}
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''Example 2:'' Returns to a specific line label.
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{{CodeStart}}
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{{Cl|GOSUB}} hey
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{{Cl|PRINT}} "it didn't go here."
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hoho:
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{{Cl|PRINT}} "it went here."
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{{Cl|END}}
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hey:
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{{Cl|RETURN}} hoho
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{{CodeEnd}}
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{{small|Code by Cyperium}}
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{{OutputStart}}
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it went here.
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{{OutputEnd}}
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''See also:''
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* [[GOSUB]], [[GOTO]]
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* [[RESUME]]
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{{PageNavigation}}
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