title: Number of threads in Loop parallelisation using OpenMP in C
body: <p>I am learning OpenMP these days. I have read many blogs on internet and after reading them i have a very common doubt about "number of threads in loop parallelization". take the example below</p>
  
  <pre><code>int x,y;
  #pragma omp parallel for private(y)
  for(x=0; x &lt; width; x++)
  {
      for(y=0; y &lt; height; y++)
      {
          finalImage[x][y] = RenderPixel(x,y, &amp;sceneData);
      }
  }
  </code></pre>
  
  <p>In this example how many threads are being used for parallelization. Is it the standard way or we should explicitly tell about number of threads ?.</p>