192 lines
10 KiB
HTML
192 lines
10 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="Operators in expressions" />
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<meta name="abstract" content="Operators are used in expressions to indicate an action to be performed on the operands in the expression or the relationship between the operands." />
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<meta name="description" content="Operators are used in expressions to indicate an action to be performed on the operands in the expression or the relationship between the operands." />
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<!-- All rights reserved. Licensed Materials Property of IBM -->
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<title>Operators in expressions</title>
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</head>
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<body id="rbam6opsinexp"><a name="rbam6opsinexp"><!-- --></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">Operators in expressions</h1>
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<div><p>Operators are used in expressions to indicate an action to be performed
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on the operands in the expression or the relationship between the operands. </p>
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<div class="section"><p>There are four kinds of operators, one for each of the four types
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of expressions:</p>
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<ul><li>Arithmetic operators <samp class="codeph">(+, -, *, /)</samp></li>
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<li>Character operator <samp class="codeph">(||, |>, |<)</samp></li>
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<li>Logical operators <samp class="codeph">(&, |, ¬)</samp></li>
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<li>Relational operators <samp class="codeph">(=, >, <, >=, <=, ¬=, ¬>, ¬<)</samp> </li>
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</ul>
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<p>Each operator must be between the operands of the expression in which
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it is used; for example, <samp class="codeph">(&A + 4)</samp>. Operators can be
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specified as a predefined value (for example, *EQ) or as a symbol (for example,
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=).</p>
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<ul><li>All predefined value operators must have a blank on each side of the operator: <pre>(&VAR *EQ 7)</pre>
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</li>
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<li>Except for the division operator (/), symbolic operators need no blanks
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on either side. For example, either <samp class="codeph">(&VAR=7)</samp> or <samp class="codeph">(&VAR =
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7)</samp> is valid. <p>Where the division operator <em>follows</em> a variable
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name, the division operator must be preceded by a blank. For example, <samp class="codeph">(&VAR
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/ 5)</samp> or <samp class="codeph">(&VAR /5)</samp> is valid; <samp class="codeph"> (&VAR/5)</samp> is
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not valid.</p>
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</li>
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</ul>
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<p>The following character combinations are the predefined values and
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symbols that represent the four kinds of operators; they should not be used
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in unquoted strings for any other purpose.</p>
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<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" frame="border" border="1" rules="all"><caption>Table 1. Predefined values
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and symbols representing the four kinds of operators</caption><thead align="left"><tr><th valign="top" id="d0e89">Predefined Value</th>
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<th valign="top" id="d0e91">Predefined Symbol</th>
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<th valign="top" id="d0e93">Meaning</th>
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<th valign="top" id="d0e95">Type</th>
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</tr>
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</thead>
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<tbody><tr><td valign="top" headers="d0e89 "> </td>
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<td valign="top" headers="d0e91 ">+</td>
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<td valign="top" headers="d0e93 ">Addition</td>
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<td valign="top" headers="d0e95 ">Arithmetic operator</td>
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</tr>
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<tr><td valign="top" headers="d0e89 "> </td>
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<td valign="top" headers="d0e91 ">-</td>
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<td valign="top" headers="d0e93 ">Subtraction</td>
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<td valign="top" headers="d0e95 ">Arithmetic operator</td>
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</tr>
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<tr><td valign="top" headers="d0e89 "> </td>
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<td valign="top" headers="d0e91 ">*</td>
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<td valign="top" headers="d0e93 ">Multiplication</td>
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<td valign="top" headers="d0e95 ">Arithmetic operator</td>
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</tr>
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<tr><td valign="top" headers="d0e89 "> </td>
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<td valign="top" headers="d0e91 ">/</td>
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<td valign="top" headers="d0e93 ">Division</td>
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<td valign="top" headers="d0e95 ">Arithmetic operator</td>
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</tr>
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<tr><td valign="top" headers="d0e89 ">*CAT</td>
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<td valign="top" headers="d0e91 ">|| <sup>1</sup></td>
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<td valign="top" headers="d0e93 ">Concatenation</td>
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<td valign="top" headers="d0e95 ">Character string operator</td>
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</tr>
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<tr><td valign="top" headers="d0e89 ">*BCAT</td>
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<td valign="top" headers="d0e91 ">|> <sup>1</sup></td>
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<td valign="top" headers="d0e93 ">Blank insertion with concatenation</td>
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<td valign="top" headers="d0e95 ">Character string operator</td>
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</tr>
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<tr><td valign="top" headers="d0e89 ">*TCAT</td>
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<td valign="top" headers="d0e91 ">|< <sup>1</sup></td>
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<td valign="top" headers="d0e93 ">Blank truncation with concatenation</td>
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<td valign="top" headers="d0e95 ">Character string operator</td>
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</tr>
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<tr><td valign="top" headers="d0e89 ">*AND</td>
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<td valign="top" headers="d0e91 ">&</td>
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<td valign="top" headers="d0e93 ">AND</td>
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<td valign="top" headers="d0e95 ">Logical operator</td>
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</tr>
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<tr><td valign="top" headers="d0e89 ">*OR</td>
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<td valign="top" headers="d0e91 ">| <sup>1</sup></td>
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<td valign="top" headers="d0e93 ">OR</td>
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<td valign="top" headers="d0e95 ">Logical operator</td>
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</tr>
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<tr><td valign="top" headers="d0e89 ">*NOT</td>
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<td valign="top" headers="d0e91 "> ¬ <sup>2</sup> </td>
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<td valign="top" headers="d0e93 ">NOT</td>
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<td valign="top" headers="d0e95 ">Logical operator</td>
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</tr>
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<tr><td valign="top" headers="d0e89 ">*EQ</td>
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<td valign="top" headers="d0e91 ">=</td>
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<td valign="top" headers="d0e93 ">Equal</td>
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<td valign="top" headers="d0e95 ">Relational operator</td>
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</tr>
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<tr><td valign="top" headers="d0e89 ">*GT</td>
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<td valign="top" headers="d0e91 ">></td>
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<td valign="top" headers="d0e93 ">Greater than</td>
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<td valign="top" headers="d0e95 ">Relational operator</td>
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</tr>
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<tr><td valign="top" headers="d0e89 ">*LT</td>
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<td valign="top" headers="d0e91 "><</td>
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<td valign="top" headers="d0e93 ">Less than</td>
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<td valign="top" headers="d0e95 ">Relational operator</td>
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</tr>
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<tr><td valign="top" headers="d0e89 ">*GE</td>
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<td valign="top" headers="d0e91 ">>=</td>
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<td valign="top" headers="d0e93 ">Greater than or equal</td>
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<td valign="top" headers="d0e95 ">Relational operator</td>
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</tr>
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<tr><td valign="top" headers="d0e89 ">*LE</td>
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<td valign="top" headers="d0e91 "><=</td>
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<td valign="top" headers="d0e93 ">Less than or equal</td>
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<td valign="top" headers="d0e95 ">Relational operator</td>
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</tr>
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<tr><td valign="top" headers="d0e89 ">*NE</td>
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<td valign="top" headers="d0e91 "> ¬= <sub>2</sub></td>
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<td valign="top" headers="d0e93 ">Not equal</td>
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<td valign="top" headers="d0e95 ">Relational operator</td>
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</tr>
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<tr><td valign="top" headers="d0e89 ">*NG</td>
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<td valign="top" headers="d0e91 "> ¬> <sub>2</sub></td>
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<td valign="top" headers="d0e93 ">Not greater than</td>
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<td valign="top" headers="d0e95 ">Relational operator</td>
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</tr>
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<tr><td valign="top" headers="d0e89 ">*NL</td>
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<td valign="top" headers="d0e91 "> ¬< <sub>2</sub></td>
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<td valign="top" headers="d0e93 ">Not less than</td>
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<td valign="top" headers="d0e95 ">Relational operator</td>
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</tr>
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<tr><td colspan="4" valign="top" headers="d0e89 d0e91 d0e93 d0e95 "><div class="note"><span class="notetitle">Note:</span> <ol><li>In some national character sets and in the multinational character set,
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the character | (hexadecimal 4F) is replaced by the character ! (exclamation
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point). Either ! or *OR can be used as the OR operator and either || or *CAT,
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!> or *BCAT, and !< or *TCAT can be used for concatenation in those
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character sets. </li>
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<li>In some national character sets and in the multinational character set,
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the character ¬ (hexadecimal 5F) is replaced by the character
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*. Either * or *NOT can be used as the NOT operator in those character sets.</li>
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</ol>
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</div>
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</td>
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</tr>
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</tbody>
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</table>
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</div>
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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="rbam6xpressincom.htm" title="A character string expression can be used for any parameter, element, or qualifier defined with EXPR(*YES) in the command definition object.">Expressions in CL commands</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="rbam6charuse.htm" title="Special characters can be used only in these special ways or inside quoted character strings or comments.">Special character use</a></div>
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<div><a href="rbam6symops.htm" title="A variety of characters can be used as symbolic operators in CL commands.">Symbolic operators</a></div>
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</div>
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<div class="reltasks"><strong>Related tasks</strong><br />
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<div><a href="addcbrkpt.htm" title="You can add a conditional breakpoint to a program that is being debugged using the Add Breakpoint (ADDBKP) command to specify the statement and condition.">Add conditional breakpoints</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="rbam6relatexp.htm" title="The operands in a relational expression can be arithmetic or character string expressions; they can also be logical constants and logical variables.">Relational expressions</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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