title: How to add a prefix to each value in a dictionary, using a loop?
body: <p>I've been given the following dictionary:</p>
  
  <pre><code>phonebook = {'Tom': '0545345345367',
               'John': '0764345323434',
               'Sandy': '0235452342465',
               'Ewan': '0656875345234',
               'Andy': '0673423123454',
               'Rebecca': '0656875345234',
               'Vicky': '0456740034344',
               'Gary': '0656875345234'}
  </code></pre>
  
  <p>And the problem asks me to add the prefix <code>'0044-'</code> before each phone number by using a for loop. I've tried to research it but everything I find seems far too complex for a problem like this.</p>