title: Getting decimal value of result
body: <p>How can I get the decimal value of any result? I have looked at <a href="http://reference.wolfram.com/mathematica/tutorial/OutputFormatsForNumbers.html" rel="nofollow">Output Format for Numbers</a>, and think that the N function should do the trick, but I can't work it out. For instance:</p>
  
  <pre><code>In[1]:=  N[Ln[2], 4]
  Out[2]:= Ln[2.000]
  </code></pre>
  
  <p>Obviously I want the evaluation of Ln[2] as a decimal, i.e. 0.6931....</p>