title: For Loop only two things included C++
body: <p>Lets say I have</p>
  
  <pre><code>int j = 23;
  for (j &lt; 20; j++) {
      //do stuff
  }
  </code></pre>
  
  <p>I know it seems stupid in this context but is this possible? Or do you have to do</p>
  
  <pre><code>int j = 23;
  for (j; j &lt; 20; j++) {
      //do stuff
  }
  </code></pre>