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<h2 class="chapter">1 Introduction</h2>
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<p>The GNU Fortran compiler front end was
designed initially as a free replacement for,
or alternative to, the unix <samp><span class="command">f95</span></samp> command;
<samp><span class="command">gfortran</span></samp> is the command you'll use to invoke the compiler.
<ul class="menu">
<li><a accesskey="1" href="About-GNU-Fortran.html#About-GNU-Fortran">About GNU Fortran</a>: What you should know about the GNU Fortran compiler.
<li><a accesskey="2" href="GNU-Fortran-and-GCC.html#GNU-Fortran-and-GCC">GNU Fortran and GCC</a>: You can compile Fortran, C, or other programs.
<li><a accesskey="3" href="Preprocessing-and-conditional-compilation.html#Preprocessing-and-conditional-compilation">Preprocessing and conditional compilation</a>: The Fortran preprocessor
<li><a accesskey="4" href="GNU-Fortran-and-G77.html#GNU-Fortran-and-G77">GNU Fortran and G77</a>: Why we chose to start from scratch.
<li><a accesskey="5" href="Project-Status.html#Project-Status">Project Status</a>: Status of GNU Fortran, roadmap, proposed extensions.
<li><a accesskey="6" href="Standards.html#Standards">Standards</a>: Standards supported by GNU Fortran.
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