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58 lines
1.4 KiB
Plaintext
58 lines
1.4 KiB
Plaintext
{{QBDLDATE:07-31-2022}}
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{{QBDLTIME:23:42:05}}
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[[ELSEIF]] is used in an [[IF...THEN]] block statement to offer an alternative condition.
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{{PageSyntax}}
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: [[IF]] {{Parameter|condition}} [[THEN]]
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:: ''{code}''
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:: ⋮
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: [[ELSEIF]] {{Parameter|condition2}} [[THEN]]
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:: ''{code}''
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:: ⋮
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: [[ELSE]]
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:: ''{alternative-code}''
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:: ⋮
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: [[END IF]]
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{{PageDescription}}
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* ELSEIF statements require a '''separate''' code block line with [[THEN]] for each alternative condition.
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* There can be more than one [[ELSE]] IF statement in a single-line IF statement.
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* If there is only one possible alternative condition (such as 0 or [[NOT]] 0), use [[ELSE]] instead.
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* If the comparisons are based on multiple conditions being true, it may require many ELSEIF comparisons. ELSE could help cover some of those conditions.
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* You can use [[SELECT CASE]] when IF blocks have a long list of alterative ELSEIF conditions.
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{{RelationalTable}}
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{{PageExamples}}
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''Example 1:'' IF statement using ELSE IF in one statement line.
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{{CodeStart}}
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IF x = 100 THEN COLOR 10: PRINT x ELSE IF x > 100 THEN COLOR 12: PRINT x ELSE PRINT "< 100"
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{{CodeEnd}}
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''Example 2:'' IF statement block
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{{CodeStart}}
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IF x = 100 THEN ' must place ANY code on next line!
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COLOR 10: PRINT x
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ELSEIF x > 100 THEN COLOR 12: PRINT x
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ELSE : PRINT "< 100"
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END IF
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{{CodeEnd}}
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{{PageSeeAlso}}
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*[[ELSE]], [[END IF]]
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*[[IF...THEN]]
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{{PageNavigation}}
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