Line numbers: Difference between revisions
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* Line numbers are used to denote a specific line of code. No colon required. | * Line numbers are used to denote a specific line of code. No colon required. | ||
* Line labels are used to denote a specific line of code with a [[colon]] when separating it from a code line. | * Line labels are used to denote a specific line of code with a [[colon]] when separating it from a code line. | ||
* [[GOSUB]] or [[DATA]] block line labels can be numerical or text line names. [[RESTORE]] can use the label to reuse data. | * [[GOSUB]] or [[DATA]] block line labels can be numerical or text line names. [[RESTORE]] can use the label to reuse data. | ||
* [[GOSUB]] blocks require a [[RETURN]] to return to the original call or to a line label or number to return to. | * [[GOSUB]] blocks require a [[RETURN]] to return to the original call or to a line label or number to return to. | ||
* [[ON ERROR]] [[GOTO]] line label or number calls use [[RESUME]] [[NEXT]] or a line label or number to resume to. | * [[ON ERROR]] [[GOTO]] line label or number calls use [[RESUME]] [[NEXT]] or a line label or number to resume to. | ||
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''See also:'' | ''See also:'' | ||
* [[GOTO]], [[RUN]] | * [[GOTO]], [[RUN]] | ||
* [[GOSUB]], [[RETURN]] | * [[GOSUB]], [[RETURN]] | ||
* [[DATA]], [[RESTORE]] | * [[DATA]], [[RESTORE]] | ||
Revision as of 02:01, 23 January 2023
Line numbers or line labels are used to denote GOTO, RUN or GOSUB procedure lines or all code lines as in GW Basic.
Number Syntax
- 10 GOTO {line number| line label}
Label Syntax
- PictureData:
- DATA 0, 0, 12, 12, 14, 12, 12, 0, 0
- Line numbers are used to denote a specific line of code. No colon required.
- Line labels are used to denote a specific line of code with a colon when separating it from a code line.
- GOSUB or DATA block line labels can be numerical or text line names. RESTORE can use the label to reuse data.
- GOSUB blocks require a RETURN to return to the original call or to a line label or number to return to.
- ON ERROR GOTO line label or number calls use RESUME NEXT or a line label or number to resume to.
- GOTO or RUN can refer to a specific numerical line number or text line label.
- Line numbers are no longer required in QB or QB64 except for GOSUB, RUN or GOTO situations.
- Line numbers and labels are not allowed after SUB/FUNCTION blocks. They are allowed inside SUB/FUNCTIONS though.
See also: