You can access the properties of an object by using two notations: the dot notation (.) We can pass the string into a symbol function for debugging and logging use. This is defined by the data operations and the type of values that can be stored. If we want multiple variables of the same or different types then remembering the names of variables is a problem. Example: var infinity=1e400*1250; NaN stands for not a number and its a result of a mathematical operation that doesnt have sense. Infix to Postfix Conversion. JavaScript strings are immutable. If done, it will also undefine the type like in the example above. Variable can be assigned or reassigned the value of any type. Every section of the JavaScript block code has script tags (