95 lines
5.4 KiB
HTML
95 lines
5.4 KiB
HTML
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<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE html
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PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<meta name="DC.Title" content="Change the value of variables" />
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<meta name="abstract" content="You can change the value of variables by using the EVAL command with the assignment operator (=)." />
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<meta name="description" content="You can change the value of variables by using the EVAL command with the assignment operator (=)." />
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<meta name="copyright" content="(C) Copyright IBM Corporation 1998, 2006" />
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<link rel="stylesheet" type="text/css" href="./ibmdita.css" />
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<link rel="stylesheet" type="text/css" href="./ic.css" />
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<title>Change the value of variables</title>
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</head>
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<body id="chgvarval"><a name="chgvarval"><!-- --></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">Change the value of variables</h1>
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<div><p>You can change the value of variables by using the EVAL command
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with the assignment operator (=).</p>
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<div class="section"> <p>The scope of the variables used in the EVAL command is defined
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by using the QUAL command. However, you do not need to specifically define
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the scope of the variables contained in a CL module because they are all of
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global scope.</p>
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<p>You can use the EVAL debug command to assign
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numeric, character, and hexadecimal data to variables provided they match
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the definition of the variable.</p>
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<p>To change the value of the variable,
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type the following on the debug command line: </p>
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<pre>EVAL variable-name = value</pre>
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<p><span class="synph"><span class="var">Variable-name</span></span> is the name of the
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variable that you want to change and <span class="synph"><span class="var">value</span></span> is an
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identifier or literal value that you want to assign to <span class="synph"><span class="var">variable-name</span></span>. </p>
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<p>Look
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at the next example:</p>
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<pre>EVAL &COUNTER = 3.0</pre>
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<p>The above example changes the value of <span class="synph"><span class="var">&COUNTER</span></span>;
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to 3.0 and shows the following on the message line of the Display Module Source
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display:</p>
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<pre>&COUNTER = 3.0 = 3.0</pre>
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<p>The result is preceded by the variable-name and value you are
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changing.</p>
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<p>When you assign values to a character variable, the following
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rules apply:</p>
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<ul><li>If the length of the source expression is less than the length of the
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target expression, the data is left justified in the target expression and
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the remaining positions are filled with blanks.</li>
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<li>If the length of the source expression is greater than the length of the
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target expression, the data is left justified in the target expression and
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truncated to the length of the target expression.</li>
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</ul>
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<div class="note"><span class="notetitle">Note:</span> DBCS variables can be assigned any of the following: <ul><li>Another DBCS variable</li>
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<li>A graphic literal of the form G'<so>DBCS data<si>'</li>
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<li>A hexadecimal literal of the form <span>X'hex digits'</span></li>
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</ul>
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</div>
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</div>
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</div>
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<div>
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<ul class="ullinks">
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<li class="ulchildlink"><strong><a href="chglogvar.htm">Example: Change logical variable</a></strong><br />
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You can change the value of a logical variable using the EVAL debug command.</li>
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<li class="ulchildlink"><strong><a href="chgcharvar.htm">Examples: Change character variable</a></strong><br />
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This example changes the value of a character variable using the EVAL debug command.</li>
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<li class="ulchildlink"><strong><a href="chgdecvar.htm">Examples: Change decimal variable</a></strong><br />
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You can change the value of a decimal variable using the EVAL debug command.</li>
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</ul>
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<div class="familylinks">
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<div class="parentlink"><strong>Parent topic:</strong> <a href="dbgile.htm" title="You can debug your ILE programs by using the ILE source debugger.">Debug ILE programs</a></div>
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</div>
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<div class="relconcepts"><strong>Related concepts</strong><br />
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<div><a href="dbpgm.htm" title="Many debug commands are available for use with the ILE source debugger.">Debug commands</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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