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<p>In <a href="page.php?w=computer_science">computer science</a> and <a href="page.php?w=computer_programming">computer programming</a>, a <b>data type</b> (or simply <b>type</b>) is a collection or grouping of <a href="page.php?w=Value_%28computer_science%29">data values</a>, usually specified by a set of possible values, a set of allowed operations on these values, and/or a representation of these values as machine types. A data type specification in a program constrains the possible values that an <a href="page.php?w=Expression_%28computer_science%29">expression</a>,</p><p>
<a accesskey="3" href="page.php?w=data_type&amp;p=2">3.Next</a>
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