153 lines
4.6 KiB
HTML
153 lines
4.6 KiB
HTML
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<!doctype html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<html>
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<head><META http-equiv="Content-Type" content="text/html; charset=utf-8">
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<title>Leave (LEAVE)</title>
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<link rel="stylesheet" type="text/css" href="../rzahg/ic.css">
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</head>
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<body bgcolor="white">
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<script language="Javascript" src="../rzahg/synch.js" type="text/javascript"></script>
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<a name="LEAVE.Top_Of_Page"></a>
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<h2>Leave (LEAVE)</h2>
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<table width="100%">
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<tr>
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<td valign="top" align="left"><b>Where allowed to run: </b>
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<ul><li>Batch program (*BPGM)</li>
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<li>Interactive program (*IPGM)</li>
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</ul><b>Threadsafe: </b>Yes
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</td>
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<td valign="top" align="right">
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<a href="#LEAVE.PARAMETERS.TABLE">Parameters</a><br>
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<a href="#LEAVE.COMMAND.EXAMPLES">Examples</a><br>
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<a href="#LEAVE.ERROR.MESSAGES">Error messages</a></td>
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</tr>
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</table>
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<div> <a name="LEAVE"></a>
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<p>The Leave (LEAVE) command ends the processing of commands in the associated DOWHILE, DOUNTIL, or DOFOR loop and passes control to the first command following the associated ENDDO command.
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</p>
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<p>The following command sequence shows this flow.
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</p>
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<p>
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<pre>
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L1: DOWHILE &LGL1
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...
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L2: DOWHILE &LGL2
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...
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IF &LGL3 (LEAVE CMDLBL(L1))
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IF &LGL4 LEAVE
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...
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ENDDO
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/* Here if &LGL4 evaluates to true */
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...
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ENDDO
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/* Here if &LGL3 evaluates to true */
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...
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</pre>
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</p>
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<p><b>Restrictions:</b>
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</p>
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<ul>
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<li>This command is valid only in CL procedures.
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</li>
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<li>This command is valid only inside a DOWHILE, DOUNTIL, or DOFOR command group.
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</li>
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</ul>
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</div>
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<table width="100%">
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<tr><td align="right"><a href="#LEAVE.Top_Of_Page">Top</a></td></tr>
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</table>
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<hr size="2" width="100%">
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<div>
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<h3><a name="LEAVE.PARAMETERS.TABLE">Parameters</a></h3>
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<table border="1" cellpadding="4" cellspacing="0">
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<!-- col1="10" col2="15" col3="30" col4="10" -->
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<tr>
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<th bgcolor="aqua" valign="bottom" align="left">Keyword</th>
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<th bgcolor="aqua" valign="bottom" align="left">Description</th>
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<th bgcolor="aqua" valign="bottom" align="left">Choices</th>
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<th bgcolor="aqua" valign="bottom" align="left">Notes</th>
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</tr>
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<tr>
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<td valign="top"><a href="#LEAVE.CMDLBL"><b>CMDLBL</b></a></td>
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<td valign="top">Command label</td>
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<td valign="top"><i>Simple name</i>, <b><u>*CURRENT</u></b></td>
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<td valign="top">Optional, Positional 1</td>
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</tr>
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</table>
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<table width="100%">
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<tr><td align="right"><a href="#LEAVE.Top_Of_Page">Top</a></td></tr>
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</table>
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</div>
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<div> <a name="LEAVE.CMDLBL"></a>
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<h3>Command label (CMDLBL)</h3>
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<p>The label must be within the same program as the LEAVE command and be a label on an active DOWHILE, DOUNTIL, or DOFOR group. A CL variable name cannot be used to specify the label name.
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</p>
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<dl>
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<dt><b><u>*CURRENT</u></b></dt>
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<dd>Leaves the innermost loop surrounding this LEAVE command.
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</dd>
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<dt><b><i>simple-name</i></b></dt>
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<dd>Specify the label name of the surrounding DOWHILE, DOUNTIL, or DOFOR command which is being ended.
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</dd>
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</dl>
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</div>
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<table width="100%">
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<tr><td align="right"><a href="#LEAVE.Top_Of_Page">Top</a></td></tr>
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</table>
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<hr size="2" width="100%">
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<div><h3><a name="LEAVE.COMMAND.EXAMPLES">Examples</a> </h3>
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<p><b>Example 1: Leave Simple DOFOR Loop</b>
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</p>
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<p>
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<pre>
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DCL VAR(&INT) TYPE(*INT) LEN(2)
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DCL VAR(&NAME) TYPE(*CHAR) LEN(10)
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:
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DOFOR VAR(&INT) FROM(0) TO(10)
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: (group of CL commands)
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IF COND(&NAME *EQ *NONE) THEN(LEAVE)
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: (group of CL commands)
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ENDDO
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</pre>
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</p>
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<p>The LEAVE command interrupts processing of the active DOFOR group and processing continues with command following the ENDDO.
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</p>
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<p><b>Example 2: Leave with Nested Loops</b>
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</p>
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<p>
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<pre>
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DCL VAR(&INT) TYPE(*INT) LEN(2)
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DCL VAR(&NAME) TYPE(*CHAR) LEN(10)
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DCL VAR(&LGL) TYPE(*LGL) VALUE('1') /* True */
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:
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LOOP1: DOFOR VAR(&INT) FROM(0) TO(10)
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: (group of CL commands)
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LOOP2: DOUNTIL COND(&LGL)
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: (group of CL commands)
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IF COND(&NAME *EQ *NONE) THEN(LEAVE CMDLBL(LOOP1))
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: (group of CL commands)
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ENDDO /* DOUNTIL */
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: (group of CL commands)
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ENDDO /* DOFOR */
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</pre>
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</p>
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<p>The LEAVE command interrupts processing of both the active DOUNTIL and DOFOR groups and processing continues with command following the ENDDO matching the DOFOR command.
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</p>
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</div>
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<table width="100%">
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<tr><td align="right"><a href="#LEAVE.Top_Of_Page">Top</a></td></tr>
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</table>
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<hr size="2" width="100%">
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<div><h3><a name="LEAVE.ERROR.MESSAGES">Error messages</a> </h3>
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<p>None
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</p>
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</div>
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<table width="100%">
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<tr><td align="right"><a href="#LEAVE.Top_Of_Page">Top</a></td></tr>
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</table>
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</body>
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</html>
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