title: Where is the C auto keyword used?
body: <p>In my college days I read about the <code>auto</code> keyword and in the course of time I actually forgot what it is. It is defined as: </p>
  
  <blockquote>
    <p>defines a local variable as having a
    local lifetime</p>
  </blockquote>
  
  <p>I never found it is being used anywhere, is it really used and if so then where is it used and in which cases?</p>