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<TITLE>Description</TITLE>
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<A HREF="toc.html">Table of Contents</A><P>
<P>Previous: <A HREF="sect1.html">Synopsis</A><HR><P>
<H2><A NAME="sect2" HREF="toc.html#toc2">Description </A></H2>
<P>
<B>ftnchek </B> (short for Fortran checker) is
designed to detect certain errors in a Fortran program that a compiler
usually does not. <B>ftnchek </B> is not primarily intended to detect syntax errors.
Its purpose is to assist the user in finding semantic errors. Semantic
errors are legal in the Fortran language but are wasteful or may cause
incorrect operation. For example, variables which are never used may indicate
some omission in the program; uninitialized variables contain garbage
which may cause incorrect results to be calculated; and variables which
are not declared may not have the intended type. <B>ftnchek </B> is intended to
assist users in the debugging of their Fortran program. It is not intended
to catch all syntax errors. This is the function of the compiler. Prior
to using <B>ftnchek </B>, the user should verify that the program compiles correctly.
<P>
This document first summarizes how to invoke <B>ftnchek </B>. That section should
be read before beginning to use <B>ftnchek </B>. Later sections describe <B>ftnchek
</B>'s options in more detail, give an example of its use, and explain how
to interpret the output. The final sections mention the limitations and
known bugs in <B>ftnchek </B>.
<P><HR><P>Next: <A HREF="sect3.html">Invoking Ftnchek </A>
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