title: Go to main() from user defined function
body: <p>I have 3 functions: <code>my_fun1()</code>, <code>my_fun2()</code>, and <code>my_fun3()</code>.</p>
  
  <p><code>main()</code> calls <code>my_fun1()</code> which calls <code>my_fun2()</code>, which in turn calls <code>my_fun3()</code>.</p>
  
  <p>Upon some pre-defined condition in <code>my_fun3()</code>, I would like my program to go directly back to the <code>main()</code> function at the line <code>my_fun1()</code> was called.</p>
  
  <p>Is it possible to go directly from <code>my_fun3()</code> to <code>main()</code>, or do I have to add some conditions to <code>my_fun2()</code> and <code>my_fun1()</code> to achieve this?</p>