title: need to use entry.get() in mathemathics
body: <p>I have tried</p>
  <pre class="lang-py prettyprint-override"><code>def iNput():
      try:
          int(entry.get())
  
          x=entry.get()
          y=x+3
  
          answer.config(text=y)
  
      except ValueError:
          answer.config(text=&quot;doesnt work&quot;)
  </code></pre>
  <p>and I get an error saying:</p>
  <pre class="lang-py prettyprint-override"><code>can only concatenate str (not &quot;int&quot;) to str
  </code></pre>