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<a accesskey="3" href="page.php?w=Lookup_table&amp;p=2">3.Next</a>
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<p>In <a href="page.php?w=computer_science">computer science</a>, a <b>lookup table</b> (<b>LUT</b>) is an <a href="page.php?w=array_data_structure">array</a> that replaces <a href="page.php?w=runtime_%28program_lifecycle_phase%29">runtime</a> computation of a mathematical <a href="page.php?w=function_%28mathematics%29">function</a> with a simpler array indexing operation, in a process termed as <b><i>direct addressing</i></b>. The savings in processing time can be significant, because retrieving a value from memory is often faster than carrying</p><p>
<a accesskey="3" href="page.php?w=Lookup_table&amp;p=2">3.Next</a>
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