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Next: <a href="Supported-Languages.html#Supported-Languages" accesskey="n" rel="next">Supported Languages</a>, Previous: <a href="Show.html#Show" accesskey="p" rel="previous">Show</a>, Up: <a href="Languages.html#Languages" accesskey="u" rel="up">Languages</a> &nbsp; [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Concept-Index.html#Concept-Index" title="Index" rel="index">Index</a>]</p>
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<a name="Type-and-Range-Checking"></a>
<h3 class="section">15.3 Type and Range Checking</h3>

<p>Some languages are designed to guard you against making seemingly common
errors through a series of compile- and run-time checks.  These include
checking the type of arguments to functions and operators and making
sure mathematical overflows are caught at run time.  Checks such as
these help to ensure a program&rsquo;s correctness once it has been compiled
by eliminating type mismatches and providing active checks for range
errors when your program is running.
</p>
<p>By default <small>GDB</small> checks for these errors according to the
rules of the current source language.  Although <small>GDB</small> does not check
the statements in your program, it can check expressions entered directly
into <small>GDB</small> for evaluation via the <code>print</code> command, for example.
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<tr><td align="left" valign="top">&bull; <a href="Type-Checking.html#Type-Checking" accesskey="1">Type Checking</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">An overview of type checking
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<tr><td align="left" valign="top">&bull; <a href="Range-Checking.html#Range-Checking" accesskey="2">Range Checking</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">An overview of range checking
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