Simple addition calculator in python
<p>I built a very simple addition calculator in python:</p>

<pre><code>#This program will add two numbers entered in by the user

print "Welcome!"

num1 = input("Please enter in the first number to be added.")
num2 = input("Please enter in the second number to be added.")

sum = num1 + num2

print "The sum of the two numbers entered is: ", sum
</code></pre>

<p>I haven't setup python yet, so I'm using codepad.org (an online compiler). 
I get the following error:
    Welcome!
    Please enter in the first number to be addeded.Traceback (most recent call last):
    Line 5, in 
    num1 = input("Please enter in the first number to be addeded.")
    EOFError</p>
