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<title>free function</title>
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<h1>free function </h1>
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<p>
<b>free</b> is used to return allocated memory to the system.
<p>
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<pre>
Library: <a href="funcref.htm#stdlib">sdlib.h</a>
Prototype: <a href="../SYNTAX/void.html">void</a> free(void *s);
Syntax: char *StrPtr;
StrPtr = (char *) malloc(100);
free(StrPtr);
</pre>
<hr>
<h2>Notes:</h2>
<ul>
<li>If you use <a href="malloc.html">malloc</a> inside a loop and dont <b>free</b>
the memory, you run the risk of the program crashing.
<p>
<li>If a program ends without issuing a <b>free</b>, any allocated memory
is returned to the system.
</uL>
<p>
<hr>
<h2>Examples:</h2>
<img src=../../GRAPHICS/computer.gif><a href="../EXAMPLES/malloc.c"> example</a>
program.
<hr>
<h2>See Also:</h2>
<img src=../../GRAPHICS/whiteball.gif>
<a href="malloc.html">malloc</a> function.<p>
<img src=../../GRAPHICS/whiteball.gif>
<a href="../../CPLUSPLUS/SYNTAX/new.html">new</a> C++ replacement for malloc.<p>
<img src=../../GRAPHICS/whiteball.gif>
<a href="../../CPLUSPLUS/SYNTAX/delete.html">delete</a> C++ replacement for free.<p>
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<address>Martin Leslie
</address><p>
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