Many characters are not available on keyboard. It is not even feasible to keep all the Special Characters and Special Symbols on keyboard. That is why such Special Characters or Symbols are used in the document with the combination of ALT Key & and code assigned to it. These codes are called as ALT Codes.
Such Special Character or Symbol can be placed in the document by pressing and holding ALT key and then typing the ALT Code assigned to the special character or symbol.
It is also possible to display Special Characters or Symbols on web page using Number Code or Name Code.
SymbolCodes.com will help you to find such ALT codes assigned to perticular Special Character or Symbol.
Use Smiley ☺ in the document
ALT code assigned to Smiley is 1