86 lines
4.9 KiB
HTML
86 lines
4.9 KiB
HTML
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<meta name="abstract" content="The Do Until (DOUNTIL) command processes a group of CL commands one or more times." />
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<title>DOUNTIL command</title>
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</head>
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<body id="dountilcmd"><a name="dountilcmd"><!-- --></a>
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<!-- Java sync-link --><script language="Javascript" src="../rzahg/synch.js" type="text/javascript"></script>
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<h1 class="topictitle1">DOUNTIL command</h1>
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<div><p>The Do Until (DOUNTIL) command processes a group of CL commands
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one or more times. </p>
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<div class="section"><p>The group of commands is defined as those commands between the <span class="cmdname">Do
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Until (DOUNTIL)</span> and the matching <span class="cmdname">End Do (ENDDO)</span> command.</p>
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<p>After
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the group of commands is processed, the stated condition is evaluated. If
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the condition is true, the DOUNTIL group will be exited and processing will
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resume with the next command following the associated ENDDO. If the condition
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is false, the group will continue processing with the first command in the
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group.</p>
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<p>The logical expression on the COND parameter may be a single
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logical variable or constant, or it must describe a relationship between two
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or more operands; the expression is then evaluated as true or false.</p>
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<p>The
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following is an example of conditional processing with a Do Until (DOUNTIL)
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command.</p>
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<pre>DOUNTIL (&LGL)
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.
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.
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.
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CHGVAR &INT (&INT + 1)
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IF (&INT *GT 5) (CHGVAR &LGL '1')
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ENDDO
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</pre>
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<p>The body of the DOUNTIL group will be run at least one time.
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If the initial value of the &INT variable is 5 or more, &LGL will
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be set to true on the first time and processing will continue following the
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ENDDO when the expression is evaluated at the end of the group. If the initial
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value is less than 5, the body of the group will continue to be repeated until
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the value of &INT is greater than 5 and the value of &LGL is changed
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to true.</p>
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<p>The <span class="cmdname">Leave (LEAVE)</span> command may be used to
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exit the DOUNTIL group and resume processing following the ENDDO. The ITERATE
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command may be used to skip the remaining commands in the group and evaluate
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the stated condition immediately.</p>
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</div>
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</div>
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<div>
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<div class="familylinks">
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<div class="parentlink"><strong>Parent topic:</strong> <a href="contp.htm" title="You can use commands to change the flow of logic within your CL procedure.">Control processing within a CL procedure</a></div>
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</div>
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<div class="relref"><strong>Related reference</strong><br />
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<div><a href="expr.htm" title="The logical operators *AND and *OR specify the relationship between operands in a logical expression. The logical operator *NOT is used to negate logical variables or constants.">*AND, *OR, and *NOT operators</a></div>
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</div>
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<div class="relinfo"><strong>Related information</strong><br />
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<div><a href="../clfinder/finder.htm">CL command finder</a></div>
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<div><a href="../cl/dountil.htm">Do Until (DOUNTIL) command</a></div>
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</div>
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</div>
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</body>
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</html>
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