title: Difference between special character and alpha numeric character?
body: <p>As of now i thought that alpha numeric character is nothing but collection of alphabets and numeric  only. </p>
  
  <p>But after reading from <a href="http://whatis.techtarget.com/definition/alphanumeric-alphameric" rel="nofollow">here</a> , i understood alpha numeric character will include some of the special character.</p>
  
  <p>is there is any difference between special and alpha numeric character?</p>