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| <helpdocument version="1.0"> |
| <meta> |
| <topic id="textsbasicshared03090301xml" indexer="include" status="PUBLISH"> |
| <title id="tit" xml-lang="en-US">GoSub...Return Statement [Runtime]</title> |
| <filename>/text/sbasic/shared/03090301.xhp</filename> |
| </topic> |
| </meta> |
| <body> |
| <section id="gosubreturn"> |
| <bookmark xml-lang="en-US" branch="index" id="bm_id3147242"> |
| <bookmark_value>GoSub...Return statement</bookmark_value> |
| </bookmark> |
| <paragraph role="heading" id="hd_id3147242" xml-lang="en-US" level="1" l10n="U"><link href="text/sbasic/shared/03090301.xhp" name="GoSub...Return Statement [Runtime]">GoSub...Return Statement [Runtime]</link></paragraph> |
| <paragraph role="paragraph" id="par_id3145316" xml-lang="en-US" l10n="U">Calls a subroutine that is indicated by a label from a subroutine or a function. The statements following the label are executed until the next Return statement. Afterwards, the program continues with the statement that follows the <emph>GoSub</emph> statement.</paragraph> |
| </section> |
| <paragraph role="heading" id="hd_id3145609" xml-lang="en-US" level="2" l10n="U">Syntax:</paragraph> |
| <paragraph role="paragraph" id="par_id3145069" xml-lang="en-US" l10n="U">see Parameters</paragraph> |
| <paragraph role="heading" id="hd_id3147265" xml-lang="en-US" level="2" l10n="U">Parameters:</paragraph> |
| <paragraph role="paragraph" id="par_id3148664" xml-lang="en-US" l10n="U">Sub/Function</paragraph> |
| <paragraph role="paragraph" id="par_id3150400" xml-lang="en-US" l10n="U">statement block</paragraph> |
| <paragraph role="paragraph" id="par_id3154140" xml-lang="en-US" l10n="U">Label:</paragraph> |
| <paragraph role="paragraph" id="par_id3150869" xml-lang="en-US" l10n="U">statement block</paragraph> |
| <paragraph role="paragraph" id="par_id3154909" xml-lang="en-US" l10n="U">GoSub Label</paragraph> |
| <paragraph role="paragraph" id="par_id3153969" xml-lang="en-US" l10n="U">Exit Sub/Function</paragraph> |
| <paragraph role="paragraph" id="par_id3154685" xml-lang="en-US" l10n="U">Label:</paragraph> |
| <paragraph role="paragraph" id="par_id3145786" xml-lang="en-US" l10n="U">statement block</paragraph> |
| <paragraph role="paragraph" id="par_id3159252" xml-lang="en-US" l10n="U">Return</paragraph> |
| <paragraph role="paragraph" id="par_id3154321" xml-lang="en-US" l10n="U">End Sub/Function</paragraph> |
| <paragraph role="paragraph" id="par_id3147318" xml-lang="en-US" l10n="U">The <emph>GoSub</emph> statement calls a local subroutine indicated by a label from within a subroutine or a function. The name of the label must end with a colon (":").</paragraph> |
| <paragraph role="warning" id="par_id3153190" xml-lang="en-US" l10n="U">If the program encounters a Return statement not preceded by <emph>GoSub</emph>, $[officename] Basic returns an error message. Use <emph>Exit Sub</emph> or <emph>Exit Function</emph> to ensure that the program leaves a Sub or Function before reaching the next Return statement.</paragraph> |
| <paragraph role="paragraph" id="par_id3145799" xml-lang="en-US" l10n="U">The following example demonstrates the use of <emph>GoSub</emph> and <emph>Return</emph>. By executing a program section twice, the program calculates the square root of two numbers that are entered by the user.</paragraph> |
| <paragraph role="heading" id="hd_id3156284" xml-lang="en-US" level="2" l10n="U">Example:</paragraph> |
| <paragraph role="paragraph" id="par_id3151073" xml-lang="en-US" l10n="U">Sub ExampleGoSub</paragraph> |
| <paragraph role="paragraph" id="par_id3154097" xml-lang="en-US" l10n="U">dim iInputa as Single</paragraph> |
| <paragraph role="paragraph" id="par_id3150715" xml-lang="en-US" l10n="U">dim iInputb as Single</paragraph> |
| <paragraph role="paragraph" id="par_id3153416" xml-lang="en-US" l10n="U">dim iInputc as Single</paragraph> |
| <paragraph role="paragraph" id="par_id3146970" xml-lang="en-US" l10n="U">iInputa = Int(InputBox$ ("Enter the first number: ","NumberInput"))</paragraph> |
| <paragraph role="paragraph" id="par_id3150329" xml-lang="en-US" l10n="U">iInputb = Int(InputBox$ ("Enter the second number: ","NumberInput"))</paragraph> |
| <paragraph role="paragraph" id="par_id3156277" xml-lang="en-US" l10n="U">iInputc=iInputa</paragraph> |
| <paragraph role="paragraph" id="par_id3150321" xml-lang="en-US" l10n="U">GoSub SquareRoot</paragraph> |
| <paragraph role="paragraph" id="par_id3154756" xml-lang="en-US" l10n="U">Print "The square root of";iInputa;" is";iInputc</paragraph> |
| <paragraph role="paragraph" id="par_id3155764" xml-lang="en-US" l10n="U">iInputc=iInputb</paragraph> |
| <paragraph role="paragraph" id="par_id3152960" xml-lang="en-US" l10n="U">GoSub SquareRoot</paragraph> |
| <paragraph role="paragraph" id="par_id3147340" xml-lang="en-US" l10n="U">Print "The square root of";iInputb;" is";iInputc</paragraph> |
| <paragraph role="paragraph" id="par_id3166450" xml-lang="en-US" l10n="U">Exit Sub</paragraph> |
| <paragraph role="paragraph" id="par_id3155176" xml-lang="en-US" l10n="U">SquareRoot:</paragraph> |
| <paragraph role="paragraph" id="par_id3149257" xml-lang="en-US" l10n="U">iInputc=sqr(iInputc)</paragraph> |
| <paragraph role="paragraph" id="par_id3146316" xml-lang="en-US" l10n="U">Return</paragraph> |
| <paragraph role="paragraph" id="par_id3154703" xml-lang="en-US" l10n="U">End Sub</paragraph> |
| </body> |
| </helpdocument> |
