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<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's correctness once it has been compiled
by eliminating type mismatches and providing active checks for range
errors when your program is running.

   <p>By default <span class="sc">gdb</span> checks for these errors according to the
rules of the current source language.  Although <span class="sc">gdb</span> does not check
the statements in your program, it can check expressions entered directly
into <span class="sc">gdb</span> for evaluation via the <code>print</code> command, for example.

<ul class="menu">
<li><a accesskey="1" href="Type-Checking.html#Type-Checking">Type Checking</a>:                An overview of type checking
<li><a accesskey="2" href="Range-Checking.html#Range-Checking">Range Checking</a>:               An overview of range checking
</ul>

   <p><a name="index-type-checking-973"></a><a name="index-checks_002c-type-974"></a>

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