JavaScript/CheatSheet

Data Types

var num = 8;                               // number
var strg = "Joe";                          // string
var vobj = {first: "John", last:"Doe"};    // object
var booli = false;                         // boolean
var arr = ["HTML","CSS","JS"];             // array
var a; typeof a;                           // undefined
var a = null;                              // value null

const pi = 3.14;

Operators

+           Addition
-           Subtraction
*           Multiplication
/           Division
(...)       Grouping operator, operations within brackets are executed earlier than those outside
%           Modulus (remainder )
++          Increment numbers
--          Decrement numbers

==          Equal to
===         Equal value and equal type
!=          Not equal
!==         Not equal value or not equal type
>           Greater than
<           Less than
>=          Greater than or equal to
<=          Less than or equal to
?           Ternary operator

&&          Logical and
||          Logical or
!           Logical not

&           AND statement
|           OR statement
~           NOT
^           XOR
<<          Left shift
>>          Right shift
>>>         Zero fill right shift