title: C language while used after do
body: <p>From Harvard's CS50 course</p>
  
  <p>basically he has a function</p>
  
  <p>where he says</p>
  
  <pre><code>do {
      int n = get_int("Positive number")
  }
  while ;
  </code></pre>
  
  <p>He wants the program to repeat positive number until the user inputs a positive number. Why is the while loop on the bottom of his do function?</p>