Using operators in JavaScript is very similar to how they are used in other programming languages. There are different types of operators you can use in JavaScript. For example, there are operators used for arithmetic, assignment , comparison, and also concatenation.

Arithmetic Operators

Arithmetic operators are used to perform basic arithmetic between variables and/or values.

Operator	Description	Example>	y=?	x=?
+	Addition	x=y+3	y=5	x=8
-	Subtraction	x=y-3	y=5	x=2
*	Multiplication	x=y*3	y=5	x=15
/	Division	x=y/3	y=6	x=2
%	Modulus (division remainder)	x=y%3	y=7	x=1
++	Increment	x=++y	y=5	x=6
--	Decrement	x=--y	y=5	x=4

Assignment Operators

Assignment operators are used to assign values to JavaScript variables.

Operator	Values	Example	Equivalent to	Result
=	x=2,y=3	x=y	x=y	x=3
+=	x=2,y=4	x+=y	x=x+y	x=6
-=	x=2,y=5	x-=y	x=x-y	x=-3
*=	x=2,y=6	x*=y	x=x*y	x=12
/=	x=20,y=5	x/=y	x=x/y	x=4
%=	x=7,y=3	x%=y	x=x%y	x=1

Comparison Operators

Comparisons are used to check the relationship between variables and/or values. Comparison operators are used inside conditional statements and for evaluation. The result is either true or false.

Operator	Description	Values	Example	Result
==	Equal To	x=2,y=3	x == y	FALSE
===	Equal To in Value and Type	x=2,y=3	x === y	FALSE
!=	Not Equal To	x=2,y=4	x != y	TRUE
!==	Not Equal To in Value nor Type	x=2,y=4	x !== y	TRUE
<	Less Than	x=2,y=5	x < y	TRUE
>	Greater Than	x=2,y=6	x > y	FALSE
<=	Less Than or Equal To	x=2,y=7	x <= y	TRUE
>=	Greater Than or Equal To	x=2,y=8	x >= y	FALSE

Logical Operators

Logical operators are used to determine the logic between variables or values. Assume in the following example that x=2 and y=3.

Operator	Description	Example	Result
&&	and	(x < 10 && y > 1)	TRUE
||	or	(x==5 || y==4)	FALSE
!	not	!(x==y)	TRUE

Concatenation

The + symbol can be used to concatenate two stings or a number and a string. The result of concatenation is a string value. In the following example, assume that string1 has a value of "John" and that string2 has a value of "Smith".

String #1	String #2	Example	Result
string1	string2	string1 + string2	"John Smith"
"John"	string2	"John" + string2	"John Smith"
string1	"Smith"	string1 + "Smith"	"John Smith"
string1	string2	string1 + "A." + string2	"John A. Smith"

• Privacy
• Support
• Archive