3. Data Types

3.6. Symbol


          Symbol could be a data type that is unique and unchanging.

          This may be a new primitive type of data that was generated with the most recent release of JavaScript (EcmaScript6). The key advantage of each symbol is that unlike other data types that can be overwritten, each symbol can be a completely unique token

          We will not go into further detail since it is an advanced and little-used type of data, but knowing that it exists is helpful.

var MySym = Symbol();