JavaScript Operators

= is used to assign values.

+ is used to add values together.

JavaScript Operators:

• Arithmetic Operators

• Assignment Operators

• Comparison Operators

• Logical Operators

Note:

JavaScript also contains a conditional operator that assigns a value to a variable based on a condition.

          /* If the quantity ordered is more than 1000
 * then the packing cost is for a large packet,
 * otherwise the packing cost is for a small packet.
*/
packingCost=(quantity>1000)?largePacket:smallPacket; 

        

Arithmetic Operators

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

Operator	Description	Example
+	Addition	x=y+2;
-	Subtraction	x=y-2;
*	Multiplication	x=y*2;
/	Division	x=y/2;
%	Modulus (division remainder)	x=y%2;
++	Pre-Increment Post-Increment	x=++y; x=y++;
--	Pre-Decrement Post-Decrement	x=--y; x=y--;

Assignment Operators

Assignment operators are used to assign values to JavaScript variables.

Operator	Example	Equivalent to
=	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;

Comparison Operators

Comparison operators are used in logical statements to determine equality or difference between variables or values.

Operator	Description
==	equal to
===	exactly equal to (value and type)
!=	not equal
!==	not exactly equal (different value or type)
>	greater than
>=	greater than or equal to
<	less than
<=	less than or equal to

Logical Operators

Logical operators are used to determine the logic between variables or values.

Operator	Description	Example
&&	and	(true && false) == false
||	or	(true || false) == true
!	not	!(false) == true