title: What does a dot after an integer mean in python?
body: <p>I am looking at this line of python code (which seems to run properly):</p>
  
  <pre><code>import numpy as np
  yl = 300 + 63*np.exp(-x/35.)
  </code></pre>
  
  <p>What is the dot doing after the 35? what does it do? Is it a signal to python that 35 is a float and not an integer? I have not seen this before. Thanks! </p>