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 JavaScript Operators JAVASCRIPT

JavaScript Operators  


JavaScript Operators

JavaScript Operators

Assignment operator (=)

The assignment operator (=) assigns a value to a variable.

 

Example

var x = 10;

Addition operator (+)

e addition operator (+) adds numbers:

Example

var x = 5;
var y = 2;
var z = x + y;

Multiplication operator (*)

The multiplication operator (*) multiplies numbers.

Example

var x = 5;
var y = 2;
var z = x * y;

JavaScript Arithmetic Operators

Arithmetic operators are used to performing arithmetic on numbers:

Operator Description
+ Addition
- Subtraction
* Multiplication
** Exponentiation
/ Division
% Modulus (Division Remainder)
++ Increment
-- Decrement

 

JavaScript Assignment Operators

Assignment operators assign values to JavaScript variables.

Operator Example Same As
= x = y x = y
+= x += y x = x + y
-= x -= y x = x - y
*= x *= y x = x * y
/= x /= y x = x / y
%= x %= y x = x % y
**= x **= y x = x ** y

The addition assignment operator (+=) adds a value to a variable.

JavaScript String Operators

The + operator can also be used to add (concatenate) strings.

Example

var txt1 = "Deepak";
var txt2 = "Chahar";
document.getElementById("demo").innerHTML = txt1 + " " + txt2;

The += assignment operator can also be used to add (concatenate) strings:

var txt1 = "What a very ";
txt1 += "nice day";

Adding Strings and Numbers

Adding two numbers, will return the sum, but adding a number and a string will return a string:

Example

var x = 5 + 5;
var y = "5" + 5;
var z = "Hello" + 5;

JavaScript Comparison Operators

Operator Description
== 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

 

JavaScript Logical Operators

Operator Description
&& logical and
|| logical or
!

logical not

 

JavaScript Type Operators

Operator Description
typeof Returns the type of a variable
instanceof Returns true if an object is an instance of an object type

 

JavaScript Bitwise Operators

Bit operators work on 32 bits numbers.

Any numeric operand in the operation is converted into a 32 bit number. The result is converted back to a JavaScript number.

Operator Description Example Same as Result Decimal
& AND 5 & 1 0101 & 0001 0001  1
| OR 5 | 1 0101 | 0001 0101  5
~ NOT ~ 5  ~0101 1010  10
^ XOR 5 ^ 1 0101 ^ 0001 0100  4
<< Zero fill left shift 5 << 1 0101 << 1 1010  10
>> Signed right shift 5 >> 1 0101 >> 1 0010   2
>>> Zero fill right shift 5 >>> 1 0101 >>> 1 0010   2

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