Project Euler #13 in Python
<p>I am doing some programming work on the website of Project Euler. For problem 13, it goes like this: </p>

<blockquote>
  <p>Work out the first ten digits of the sum of the following one-hundred 50-digit numbers.</p>
</blockquote>

<p>This is my solution thus far:</p>

<pre><code>def euler13():
    sum_num=0
    with open("euler13.txt") as numfile:
        for each in numfile:
            sum_num+=int(each)
    print(str(sum_num)[0:10])
</code></pre>

<p>My output is 5479680016, but the expected output is: </p>

<blockquote class="spoiler">
  <p> 5537376230.  </p>
</blockquote>

<p>What is wrong with my solution?</p>
