title: Concatenate two integers
body: <p>What is the best way to concatenate two integers to an integer in Fortran?</p>
  
  <pre><code>integer a = 999
  integer b = 1111
  </code></pre>
  
  <p><code>integer c</code>  should be <code>9991111</code></p>
  
  <p>Thanks,
  SM.</p>