Operators Reference

Used to perform calculations with logical combination of different operators

• turned_in_notArithmetic Operators

  Operators	Used	Example x=3, y=2	Result
  +	For Addition of number For joining multiple string For converting a string number into number	x + y "Hel" + "lo" + "2.3"	5 "Hello" 2.3
  -	For Subtraction For converting a string number into negative number	x - y - "2.3"	1 -2.3
  *	For Multiplication	x * y	6
  /	For Division	x / y	1.5
  %	For Modulus (remainder)	x % y	1
  **	For Exponentiation/Power-Of	x ** y	9
  ~~	For Floor value	~~1.4	1
  ++	For Increment Prefix ++i Postfix i++	x = ++y x = y++	x = 3 , y = 3 x = 2 , y = 3
  --	For Decrement Prefix --i Postfix i--	x = --y x = y--	x = 1 , y = 1 x = 2 , y = 1

• turned_in_notBitwise Operators

  Operators	Description	Example x=3, y=2	Result
  &	AND	x & y	2
  |	OR	x | y	3
  ~	NOT	~ y	3
  ^	XOR	x ^ y	1
  <<	Zero fill Left Shift	x << 1	6
  >>	Signed Right Shift	x >> 1	1
  >>>	Zero fill Right Shift	x >>> 1	6

• turned_in_notComparison Operators

  Operators	Description	Example x=3, y=2	Result
  ==	equal to	x == y	false
  ===	equal value and equal data type	x === y	false
  !=	not equal	x != y	true
  !==	not equal value or not equal data type	x !== y	true
  >	greater than	x > y	true
  <	less than	x < y	false
  >=	greater than or equal to	x >= y	true
  <=	less than or equal to	x <= y	false

• turned_in_notConditional Operator

  Operator	Description	Example	Result
  ? :	ternary operator	(x > y) ? "Yes" : "No"	Yes

• turned_in_notNullify Operator

  Operator	Description	Example	Result
  ??	nullify operator - To check for !null or !undefined	null ?? 2 undefined ?? 2 4 ?? 2	2 2 4

• turned_in_notLogical Operators

  Operators	Description	Example x=3, y=2	Result
  &&	and - true if all conditions are true	(x > y && x==y)	false
  ||	or - true if any condition is true	(x > y || x==y)	true
  !	not - the opposite of actual result	! (x > y)	false

• turned_in_notAssignment Operators

  Operators	Used	Example	Same As
  =	To assign value	x = y	x = y
  +=	To assign Addition of number or string value	x += y	x = x + y
  -=	To assign Subtraction value	x -= y	x = x - y
  *=	To assign Multiplication value	x *= y	x = x * y
  /=	To assign Division value	x /= y	x = x / y
  %=	To assign Modulus (remainder) value	x %= y	x = x % y
  **=	To assign Exponentiation (Power Of) value	x **= y	x = x ** y
  &=	To assign AND operator value	x &= y	x = x & y
  |=	To assign OR operator value	x |= y	x = x | y
  ^=	To assign XOR operator value	x ^= y	x = x ^ y
  <<=	To assign Zero fill Left Shift value	x <<= y	x = x << y
  >>=	To assign Signed Right Shift value	x >>= y	x = x >> y
  >>>=	To assign Zero fill Right Shift value	x >>>= y	x = x >>> y
  []=[]	Destructuring array To assign similar array structure variables	[a,b] = [1,2]	a = arr[0], b = arr[1]
  {}={}	Destructuring object To assign similar object structure variables	{a,b} = {a:1,b:2}	a = obj.a, b = obj.b

• turned_in_notExpression Operators

  Operators	Used
  ()	To evaluate grouped expression To create a function
  ()=>	To create an arrow function
  ()()	To auto run a function To create a functional object constructor
  ,	(comma) To create multiple expressions in single statement and returns the result of the last expression To separate elements of array or object
  :	(colon) To define a property value as used in object, switch-case, lebels
  ;	(semicolon) To terminate or end an statement
  .	(dot) To access property or method of an object
  ''	(single quote) To create a string
  ""	(double quote) To create a string
  ``	(back-tick) To create single statement string, integrating JavaScript code using $ into it
  ${}	To add javascript codes inside ``(back-tick) operator
  {}	To create an object
  []	To create an array To access values in an array To access property of an object
  / /	To create a Regular expression
  //	To create a single-line comment
  /* */	To create a multi-line comment
  ...	(triple dot) To create a rest parameter inside a function // Spread syntax allows an expression to be expanded in places where multiple arguments (for function calls) or multiple elements (for array literals) are expected. To create new copy of any array or object

• turned_in_notExtra Operators

  Operators	Used	Example x={a1:"A", a2:"B"}	Result
  delete	To delete a property from an object	delete x.a1	// x deletes 'a1' property now
  in	To check specified value is in an object or not	a2 in x	true
  instanaceof	To check whether an instance is of specified object (Array, Date, Object, String, Number, Boolean, Function, custom object) or not	x instanceof Array	false
  typeof	To find the data type of a specified variable, object, function or expression within string, number, boolean, function, undefined, object (object includes array, date), custom object	typeof x	object
  new	To create an instance of an object	new Boolean(true)	true
  this	To refer the current object
  javascript:	To integrate an expression on a hyper-link, run only when link is clicked	javascript:void(console.log(2+3))	5 //print on console
  data:	To create a data of specific type, to be used as inline data for a source (src, href, srcdoc Attributes, url( )) *base64	data:text/html,<b>My text</b>	My text

• turned_in_notGlobal Operators

  Operators	Used
  Boolean()	To convert a defined variable value (!null, !undefined) to a boolean
  decodeURI()	To decode a URI
  decodeURIComponent()	To decode a URI component
  encodeURI()	To encode a URI
  encodeURIComponent()	To encode a URI component
  eval()	To evaluate a string and executes it as if it was script code
  isFinite()	To convert into number then checks whether a value is a finite, legal number
  isNaN()	To convert into number then checks whether a value is an Not-a-Number
  Number()	To convert a defined variable value (!null, !undefined) to a number
  parseFloat()	To parse a string and returns a floating point number
  parseInt()	To parse a string and returns an integer To convert digital form (like binary, octal, hex) into decimal number
  String()	To convert a defined variable value (!null, !undefined) to a string
  toString()	To convert a defined variable value (!null, !undefined) to a string To convert any number into its digital form (like binary, octal, hex)
  uneval()	* To create script code as a string
  valueOf()	To get the primitive value of an object (Array, Date, Object, String, Number, Boolean, Function, custom object)
  void()	To run any expression and returns undefined, similar to eval( ) but don't run string as script code

• turned_in_notGlobal Properties

  Properties	Used
  Infinity	To get a numeric value that represents positive/negative infinity
  NaN	To get constant value as 'NaN'
  undefined	To check variable has not assigned any value
  prototype	To add custom properties and methods to an object
  constructor	To get the function that created JavaScript's prototype