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"1.0" encoding=
"UTF-8"?>
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34 <helpdocument version=
"1.0">
36 <topic id=
"textsbasicshared03090201xml" indexer=
"include" status=
"PUBLISH">
37 <title id=
"tit" xml-lang=
"en-US">Do...Loop Statement [Runtime]
</title>
38 <filename>/text/sbasic/shared/
03090201.xhp
</filename>
41 <created date=
"2003-10-31T00:00:00">Sun Microsystems, Inc.
</created>
42 <lastedited date=
"2004-08-24T13:30:35">converted from old format - fpe
</lastedited>
47 <bookmark xml-lang=
"en-US" branch=
"index" id=
"bm_id3156116"><bookmark_value>Do...Loop statement
</bookmark_value>
48 <bookmark_value>While; Do loop
</bookmark_value>
49 <bookmark_value>Until
</bookmark_value>
50 <bookmark_value>loops
</bookmark_value>
52 <paragraph role=
"heading" id=
"hd_id3156116" xml-lang=
"en-US" level=
"1" l10n=
"U" oldref=
"1"><link href=
"text/sbasic/shared/03090201.xhp" name=
"Do...Loop Statement [Runtime]">Do...Loop Statement [Runtime]
</link></paragraph>
53 <paragraph role=
"paragraph" id=
"par_id3109850" xml-lang=
"en-US" l10n=
"U" oldref=
"2">Repeats the statements between the Do and the Loop statement while the condition is True or until the condition becomes True.
</paragraph>
55 <paragraph role=
"heading" id=
"hd_id3149119" xml-lang=
"en-US" level=
"2" l10n=
"U" oldref=
"3">Syntax
</paragraph>
56 <paragraph role=
"paragraph" id=
"par_id3155150" xml-lang=
"en-US" l10n=
"U" oldref=
"4">Do [{While | Until} condition = True]
</paragraph>
57 <paragraph role=
"paragraph" id=
"par_id3154422" xml-lang=
"en-US" l10n=
"U" oldref=
"5">statement block
</paragraph>
58 <paragraph role=
"paragraph" id=
"par_id3150789" xml-lang=
"en-US" l10n=
"U" oldref=
"6">[Exit Do]
</paragraph>
59 <paragraph role=
"paragraph" id=
"par_id3155805" xml-lang=
"en-US" l10n=
"U" oldref=
"7">statement block
</paragraph>
60 <paragraph role=
"paragraph" id=
"par_id3145090" xml-lang=
"en-US" l10n=
"U" oldref=
"8">Loop
</paragraph>
61 <paragraph role=
"paragraph" id=
"par_id3154749" xml-lang=
"en-US" l10n=
"U" oldref=
"9">or
</paragraph>
62 <paragraph role=
"paragraph" id=
"par_id3150503" xml-lang=
"en-US" l10n=
"U" oldref=
"10">Do
</paragraph>
63 <paragraph role=
"paragraph" id=
"par_id3149762" xml-lang=
"en-US" l10n=
"U" oldref=
"11">statement block
</paragraph>
64 <paragraph role=
"paragraph" id=
"par_id3150984" xml-lang=
"en-US" l10n=
"U" oldref=
"12">[Exit Do]
</paragraph>
65 <paragraph role=
"paragraph" id=
"par_id3143228" xml-lang=
"en-US" l10n=
"U" oldref=
"13">statement block
</paragraph>
66 <paragraph role=
"paragraph" id=
"par_id3149235" xml-lang=
"en-US" l10n=
"U" oldref=
"14">Loop [{While | Until} condition = True]
</paragraph>
67 <paragraph role=
"heading" id=
"hd_id3156024" xml-lang=
"en-US" level=
"2" l10n=
"U" oldref=
"15">Parameters/Elements
</paragraph>
68 <paragraph role=
"paragraph" id=
"par_id3156344" xml-lang=
"en-US" l10n=
"U" oldref=
"16">
69 <emph>Condition:
</emph> A comparison, numeric or string expression, that evaluates either True or False.
</paragraph>
70 <paragraph role=
"paragraph" id=
"par_id3149669" xml-lang=
"en-US" l10n=
"U" oldref=
"17">
71 <emph>Statement block:
</emph> Statements that you want to repeat while or until the condition is True.
</paragraph>
72 <paragraph role=
"paragraph" id=
"par_id3150791" xml-lang=
"en-US" l10n=
"U" oldref=
"18">The
<emph>Do...Loop
</emph> statement executes a loop as long as, or until, a certain condition is True. The condition for exiting the loop must be entered following either the
<emph>Do
</emph> or the
<emph>Loop
</emph> statement. The following examples are valid combinations:
</paragraph>
73 <paragraph role=
"heading" id=
"hd_id3154366" xml-lang=
"en-US" level=
"2" l10n=
"U" oldref=
"19">Syntax
</paragraph>
74 <paragraph role=
"paragraph" id=
"par_id3145171" xml-lang=
"en-US" l10n=
"U" oldref=
"20">Do While condition = True
</paragraph>
75 <paragraph role=
"paragraph" id=
"par_id3149203" xml-lang=
"en-US" l10n=
"U" oldref=
"21">...statement block
</paragraph>
76 <paragraph role=
"paragraph" id=
"par_id3125864" xml-lang=
"en-US" l10n=
"U" oldref=
"22">Loop
</paragraph>
77 <paragraph role=
"paragraph" id=
"par_id3154124" xml-lang=
"en-US" l10n=
"U" oldref=
"24">The statement block between the Do While and the Loop statements is repeated so long as the condition is true.
</paragraph>
78 <paragraph role=
"paragraph" id=
"par_id3153968" xml-lang=
"en-US" l10n=
"U" oldref=
"25">Do Until condition = True
</paragraph>
79 <paragraph role=
"paragraph" id=
"par_id3154909" xml-lang=
"en-US" l10n=
"U" oldref=
"26">...statement block
</paragraph>
80 <paragraph role=
"paragraph" id=
"par_id3159151" xml-lang=
"en-US" l10n=
"U" oldref=
"27">Loop
</paragraph>
81 <paragraph role=
"paragraph" id=
"par_id3150440" xml-lang=
"en-US" l10n=
"U" oldref=
"29">The statement block between the Do Until and the Loop statements is repeated if the condition so long as the condition is false.
</paragraph>
82 <paragraph role=
"paragraph" id=
"par_id3153952" xml-lang=
"en-US" l10n=
"U" oldref=
"30">Do
</paragraph>
83 <paragraph role=
"paragraph" id=
"par_id3147349" xml-lang=
"en-US" l10n=
"U" oldref=
"31">...statement block
</paragraph>
84 <paragraph role=
"paragraph" id=
"par_id3159153" xml-lang=
"en-US" l10n=
"U" oldref=
"32">Loop While condition = True
</paragraph>
85 <paragraph role=
"paragraph" id=
"par_id3146985" xml-lang=
"en-US" l10n=
"U" oldref=
"34">The statement block between the Do and the Loop statements repeats so long as the condition is true.
</paragraph>
86 <paragraph role=
"paragraph" id=
"par_id3150488" xml-lang=
"en-US" l10n=
"U" oldref=
"35">Do
</paragraph>
87 <paragraph role=
"paragraph" id=
"par_id3153189" xml-lang=
"en-US" l10n=
"U" oldref=
"36">...statement block
</paragraph>
88 <paragraph role=
"paragraph" id=
"par_id3155411" xml-lang=
"en-US" l10n=
"U" oldref=
"37">Loop Until condition = True
</paragraph>
89 <paragraph role=
"paragraph" id=
"par_id3151117" xml-lang=
"en-US" l10n=
"U" oldref=
"39">The statement block between the Do and the Loop statements repeats until the condition is true.
</paragraph>
90 <paragraph role=
"paragraph" id=
"par_id3149484" xml-lang=
"en-US" l10n=
"U" oldref=
"41">Use the
<emph>Exit Do
</emph> statement to unconditionally end the loop. You can add this statement anywhere in a
<emph>Do
</emph>...
<emph>Loop
</emph> statement. You can also define an exit condition using the
<emph>If...Then
</emph> structure as follows:
</paragraph>
91 <paragraph role=
"paragraph" id=
"par_id3149262" xml-lang=
"en-US" l10n=
"U" oldref=
"42">Do...
</paragraph>
92 <paragraph role=
"paragraph" id=
"par_id3149298" xml-lang=
"en-US" l10n=
"U" oldref=
"43">statements
</paragraph>
93 <paragraph role=
"paragraph" id=
"par_id3145646" xml-lang=
"en-US" l10n=
"U" oldref=
"44">If condition = True Then Exit Do
</paragraph>
94 <paragraph role=
"paragraph" id=
"par_id3154490" xml-lang=
"en-US" l10n=
"U" oldref=
"45">statements
</paragraph>
95 <paragraph role=
"paragraph" id=
"par_id3153159" xml-lang=
"en-US" l10n=
"U" oldref=
"46">Loop...
</paragraph>
96 <paragraph role=
"heading" id=
"hd_id3147396" xml-lang=
"en-US" level=
"2" l10n=
"U" oldref=
"47">Example
</paragraph>
97 <paragraph role=
"paragraph" id=
"par_id3144764" xml-lang=
"en-US" l10n=
"U" oldref=
"49">Sub ExampleDoLoop
</paragraph>
98 <paragraph role=
"paragraph" id=
"par_id3154791" xml-lang=
"en-US" l10n=
"U" oldref=
"50">Dim sFile As String
</paragraph>
99 <paragraph role=
"paragraph" id=
"par_id3149401" xml-lang=
"en-US" l10n=
"U" oldref=
"51">Dim sPath As String
</paragraph>
100 <paragraph role=
"paragraph" id=
"par_id3155600" xml-lang=
"en-US" l10n=
"U" oldref=
"52">sPath =
"c:\"</paragraph>
101 <paragraph role=
"paragraph" id=
"par_id3150717" xml-lang=
"en-US" l10n=
"U" oldref=
"53">sFile = Dir$( sPath ,
22)
</paragraph>
102 <paragraph role=
"paragraph" id=
"par_id3146898" xml-lang=
"en-US" l10n=
"U" oldref=
"54">If sFile
<> "" Then
</paragraph>
103 <paragraph role=
"paragraph" id=
"par_id3156333" xml-lang=
"en-US" l10n=
"U" oldref=
"55">Do
</paragraph>
104 <paragraph role=
"paragraph" id=
"par_id3153947" xml-lang=
"en-US" l10n=
"U" oldref=
"56">MsgBox sFile
</paragraph>
105 <paragraph role=
"paragraph" id=
"par_id3150327" xml-lang=
"en-US" l10n=
"U" oldref=
"57">sFile = Dir$
</paragraph>
106 <paragraph role=
"paragraph" id=
"par_id3150749" xml-lang=
"en-US" l10n=
"U" oldref=
"58">Loop Until sFile =
""</paragraph>
107 <paragraph role=
"paragraph" id=
"par_id3153765" xml-lang=
"en-US" l10n=
"U" oldref=
"59">End If
</paragraph>
108 <paragraph role=
"paragraph" id=
"par_id3148914" xml-lang=
"en-US" l10n=
"U" oldref=
"60">End Sub
</paragraph>