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    <p>Your function doesn't return anything, so that's why when you use it with the <code>print</code> statement you get <code>None</code>. So either just call your function like this:</p> <pre><code>leapyr(1900) </code></pre> <p>or modify your function to return a value (by using the <code>return</code> statement), which then would be printed by your <code>print</code> statement.</p> <p><strong><em>Note</em>: This does not address any possible problems you have with your leap year computation, but ANSWERS YOUR SPECIFIC QUESTION</strong> as to <em>why</em> you are getting <code>None</code> as a result of your function call in conjunction with your <code>print</code>.</p> <p><em>Explanation</em>:</p> <p>Some short examples regarding the above:</p> <pre><code>def add2(n1, n2): print 'the result is:', n1 + n2 # prints but uses no *return* statement def add2_New(n1, n2): return n1 + n2 # returns the result to caller </code></pre> <p>Now when I call them:</p> <pre><code>print add2(10, 5) </code></pre> <p>this gives:</p> <pre><code>the result is: 15 None </code></pre> <p>The first line comes form the <code>print</code> statement <em>inside</em> of <code>add2()</code>. The <code>None</code> from the print statement when I call the function <code>add2()</code> which does <strong>not</strong> have a return statement, causing the <code>None</code> to be printed. Incidentally, if I had just called the <code>add2()</code> function simply with (note, <strong><em>no</em></strong> <code>print</code> statement):</p> <pre><code>add2() </code></pre> <p>I would have just gotten the output of the print statement <code>the result is: 15</code> without the <code>None</code> (which looks like what you are trying to do).</p> <p>Compare this with:</p> <pre><code>print add2_New(10, 5) </code></pre> <p>which gives:</p> <pre><code>15 </code></pre> <p>In this case the result is computed in the function <code>add2_New()</code> and no print statement, and returned to the caller who then prints it in turn.</p>
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    1. POHow to determine whether a year is a leap year?
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    1. COIt might help to clarify that `print`ing does not return a value. The OP must explicitly call `return` in order to actually return a value
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    2. CO@inspectorG4dget good point, I just added mention of the `return` statement, I'll see if I can clarify this further. Thanks.
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    3. CO@Downvoter: would you like to provide a reason? This is a fairly well written answer
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