A.) = 10; var v = 11; var z

A.)   
Values
– they are what comprise of any data that can be manipulated by a computer program.
Examples include;

A digit (e.g. 1) or A letter (e.g. Z) or a
string (e.g. Sam Smith).

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B.)    Numbers –  This are arithmetic values used in
counting or making calculations. In JavaScript the numbers can be written
including their decimals. For example:                                                              var x = 2.16; // With decimal
var y = 18; // without decimal

C.)    Strings – In JavaScript, a
string refers to any characters written inside quotes.

    E.g.
 var y = “Sam Smith”;

D.)   
Boolean
Values –    They are used represent
either one of two values in JavaScript. For example                                           

True/false

Yes/No

                                                                         

E.)    Reserve words -This are words
that you cannot use as identifiers in JavaScript. Examples;

Boolean, catch, break.

F.)    
Unary
operators – In JavaScript unary operators can be used for converting a
variable to a number.eg                                                                                                                                          
                                                                                 var z = “5”; 
var y = + z; 

G.)   
Automatic
type Conversion – this is
where JavaScript encounters a “wrong” data type, and thus tries
converting it to the right one. E.g.  10 + null // returns
10 because null is converted to 0. –

H.)   
Variables
– In JavaScript Variables are used to store values.  E.g.                                                                 var u = 10;
var v = 11;
var z = u + v;                                  

I.)     
 Expressions – In JavaScript,
an
expression is any valid set of variables, operators, and expressions that
evaluates to a single value.  E.g.
x=8.  The expression assigns X to the
value 8.

 

J.)     
Keywords
– they are words in JavaScript that you cannot use to name labels or variables.
E.g. float, Boolean, double.