title: Save data into excel file in Python
body: <p>I wrote a python code to get a string output as following code segment.</p>
  
  <pre><code>a = "First "
  b = "Second"
  c = a+b
  </code></pre>
  
  <p>I need to save value of c in a excel file every time I run that program.How can I do that?</p>