title: review my circle creating code( turtle, python)
body: <p>im new to python and just started touching turtle. I made this code of circle drawing and i have a few questions:</p>
  
  <pre><code>import turtle
  jo = turtle.Turtle()
  def polygon(t, r, n, l):
      for i in range(30):
          jo.fd(n * l)
          jo.lt(r * 2 * 3.14)
  print(polygon(jo, 2, 3, 4))
  turtle.done()
  </code></pre>
  
  <p>1) i really dont understand how the code i wrote draw a circle.</p>
  
  <p>2) are there any other ways to draw a circle in a similar sytax?</p>
  
  <p>3) is this code is fine or I need to improve it?</p>