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Home > JavaScript Tutorial
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JavaScript operators are used to perform an operation. There are different types of operators for different uses.

JavaScript Operators

The assignment operator = is used to assign values to JavaScript variables.

The assignment operator + is used to add values together.

Example

y=5;
z=2;
x=y+z;

The value of x, after the execution of the statements above is 7.

JavaScript Arithmetic Operators

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

Given that y=5, the table below explains the arithmetic operators:

OperatiorsDescription
+Addition
-Subtraction
*Multiplication
/Division
%Modulus (remainder of a division)
++Increment
--Decrement

JavaScript Assignment Operators

Assignment operators are used to asign values to variables and/or values.

OperatiorsDescription
=Assign
+=Add and assign. For example, x+=y is the same as x=x+y.
-=Subtract and assign. For example, x-=y is the same as x=x-y.
*=Multiply and assign. For example, x*=y is the same as x=x*y.
/=Divide and assign. For example, x/=y is the same as x=x/y.
%=Modulus and assign. For example, x%=y is the same as x=x%y.

String Operators

In JavaScript, a string is simply a piece of text.

OperatiorsDescription
=Assign
+Concatenate (join two strings together)
+=Concatenate and assign

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