title: Python function execution
body: <p>So i found this site called codewars.com and wanted to signup. When i selected my language as python, it gave me a problem to solve:</p>
  
  <p>The code does not execute properly. Try to figure out why.</p>
  
  <pre><code>def multiply(a, b):
    a * b
  </code></pre>
  
  <p>I am not able to figure out why. It executes correctly in PyCharm using python 3.4 when i added <code>print(a*b)</code> instead of a*b and when i called the function using <code>multiply(2,3)</code>. The code is also being successfully executed using just the given snippet. It has been given that the above python code is in 2.7 Any ideas?</p>