title: Parsing a char to u32
body: <p>As the questions states, how do I achieve this?</p>
  
  <p>If I have a code like this:</p>
  
  <pre><code>let a = "29";
  for c in a.chars() {
      println!("{}", c as u32);
  }
  </code></pre>
  
  <p>What I obtain is the unicode codepoints for 2 and 9:</p>
  
  <ul>
  <li>50</li>
  <li>57</li>
  </ul>
  
  <p>What I want is to parse those characters into the actual numbers.</p>