title: gfortran not printing but no compiler errors
body: <p>I'm new to working with Fortran and was trying to compile my first script and have <code>gfortran</code> installed on my Mac, but when I try and compile my script via terminal nothing happens. This might be a bigger issue than I hope but here is my setup.</p>
  
  <p>I changed the PATH away from the MacPorts version of GCC because I was getting errors as well, so I'm trying to use the Homebrew version.</p>
  
  <p>When checking </p>
  
  <pre><code>$ which gfortran
  &gt;&gt;&gt; /usr/local/Cellar/gcc/9.3.0/bin/gfortran
  
  $ gfortran --version
  &gt;&gt;&gt; GNU Fortran (Homebrew GCC 9.3.0) 9.3.0
  </code></pre>
  
  <p>My Fortran HelloWorld.f90 script has this:</p>
  
  <pre><code>program HelloWorld
      implicit none
      CHARACTER(LEN=20) :: hello 
      hello = "Hello World!"
      print *,hello
  end program HelloWorld
  </code></pre>
  
  <p>In my terminal I run the script:</p>
  
  <pre><code>$ gfortran HelloWorld.f90
  </code></pre>
  
  <p>No errors appear but nothing returns either...</p>
  
  <p>I also have tried in my Eclipse environment but same issues occur. </p>
  
  <p>Again this is my first experience with Fortran so I'm sure there is something missing. Am I using the correct file extension? Any insight would be incredibly helpful right now and I'm happy to provide any info desired to help, thanks!</p>