title: Fortran splats my output to asterisks - why?
body: <p>I'm having a hard time wrapping my head around formatting statements in Fortran.</p>
  
  <p>Without formatting my output, this is what I do (inside a loop, so this happens a few times):</p>
  
  <pre><code>write(*,*) t*1E9
  </code></pre>
  
  <p><code>t</code> here is <code>real*8</code>. The output is just what I'd expect - increments of 0.1, with some rounding errors:</p>
  
  <pre><code>0.0000000000000000     
  0.10000000000000001     
  0.20000000000000001     
  0.29999999999999999     
  0.40000000000000002     
  0.50000000000000000     
  0.59999999999999998     
  0.69999999999999996     
  0.79999999999999993     
  0.89999999999999991     
  0.99999999999999989
  </code></pre>
  
  <p>Now, I try to add a format statement:</p>
  
  <pre><code>write(*, '(F1.2)') t*1E9
  </code></pre>
  
  <p>and (with everything else the same) instead I get only asterisks in my output:</p>
  
  <pre><code>**
  **
  (etc...)
  </code></pre>
  
  <p>I've tried to read up on how this should work, and I can't figure out why this is happening. I've tried formats with more space for digits (<code>F15.15</code> just gives me more asterisks per line), I've tried moving the format statement to its own, labelled line... I just can't seem to get the output I'd like.</p>
  
  <p>What am I missing here?</p>