66 lines
4.0 KiB
HTML
66 lines
4.0 KiB
HTML
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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.Type" content="reference" />
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<meta name="DC.Title" content="Expressions" />
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<meta name="abstract" content="An expression is the value used as the result of evaluating an expression." />
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<meta name="description" content="An expression is the value used as the result of evaluating an expression." />
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<meta name="copyright" content="(C) Copyright IBM Corporation 1998, 2006" />
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<title>Expressions</title>
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</head>
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<body id="rbam6express"><a name="rbam6express"><!-- --></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">Expressions</h1>
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<div><p>An expression is the value used as the result of evaluating an
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expression.</p>
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<div class="section"><p>The types of expressions are arithmetic, character string, relational,
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and logical. Expressions can be used as a value for parameters in commands
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in CL programs only.</p>
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<p>An expression is a group of constants or variables,
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separated by operators, that produces a single value. The operators specify
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how the values are combined to produce the single value or result. The operators
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can be arithmetic, character string, relational, or logical. The constants
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or variables can be character, decimal, integer, or logical. For example,
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the expression (&A + 1) specifies that the result of adding 1 to the value
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in the variable &A is used in place of the expression.</p>
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<p>Character
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string expressions can be used in certain command parameters defined with
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EXPR(*YES) in CL programs. An expression can contain the built-in functions
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%BINARY (or %BIN), %SUBSTRING (or %SST), and %SWITCH. The types
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of expressions and examples of each are described there.</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="rbam6parmvalues.htm" title="A parameter value is user-supplied information used during the running of a command.">Parameter values</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="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="relref"><strong>Related reference</strong><br />
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<div><a href="rbam6charstrings.htm" title="A character string is a string of any EBCDIC characters (alphanumeric and special) that are used as a value.">Character string</a></div>
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<div><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>
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</body>
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