title: Changing bool values to opposite of the initial value
body: <p>This maybe sound strange to you but I'm too lazy to write everytime like</p>
  
  <pre><code>if (threadAlive)
  {
              threadAlive = false;
  }
          else
  {
              threadAlive = true;
  }
  </code></pre>
  
  <p>isn't there is something like int++ or int-- to change bool value to opposite of its value?</p>