JavaScript Operators

JavaScript operators operate the operands, these are symbols that are used to manipulate a certain value or operand. Operators are used to performing specific mathematical and logical computations on operands.

In JavaScript, operators are used to compare values, perform arithmetic operations, etc.

JavaScript Operators: There are various operators supported by JavaScript.

JavaScript Arithmetic Operators

Name	Description	Syntax	Example
Addition (+)	Addition ‘+’ operator performs addition on two operands. This ‘+’ operator can also be used to concatenate (add) strings.	Y = “Geeks” + “for” + “Geeks” gives Y = “GeeksforGeeks” Y	Try
Subtraction (-)	Subtraction ‘-‘ operator performs subtraction on two operands.	Y = 5 – 3 gives Y = 2	Try
Multiplication (*)	Multiplication ‘*’ operator performs multiplication on two operands.	Y = 5 * 5 gives Y = 25	Try
Division (/)	Division ‘/’ operator performs division on two operands (divide the numerator by the denominator).	Y = 5 / 5 gives Y = 1	Try
Modulus (%)	Modulus ‘%’ operator gives a remainder of an integer division.	A % B means remainder (A/B) Y = 5 % 4 gives Y = 1	Try
Exponentiation (**)	Exponentiation ‘**’ operator give the power of the first operator raised to the second operator.	Y = 5 ** 3 gives Y = 125	Try
Increment(++)	Increment ‘+ +’ operator increases an integer value by one.	let A = 10 and Y = A + + then A = 11, Y=10	Try
Decrement (- -)	Decrement ‘- -‘ operator decreases an integer value by one.	let A = 10 and Y = A – – then A = 9, Y=10	Try
Unary (+)	Unary ‘+’ is the fastest and preferred way of converting something into a number	+a means a is a positive number	Try
Negation (-)	Negation ‘-‘ operator gives the negation of an operand.	-a means a is a negative number	Try

JavaScript Assignment Operators

The assignment operation evaluates the assigned value. Chaining the assignment operator is possible in order to assign a single value to multiple variables

Name	Description	Syntax	Example
Assignment (=)	This operator assigns the right operand value to the left operand.	If A = 10 and Y = A then Y = 10	Try
Addition Assignment (+=)	Sums up left and right operand values and then assigns the result to the left operand.	Y += 1 gives Y = Y + 1	Try
Subtraction Assignment (- =)	It subtracts the right side value from the left side value and then assigns the result to the left operand.	Y -= 1 gives Y = Y – 1	Try
Multiplication Assignment (*=)	It multiplies a variable by the value of the right operand and assigns the result to the variable.	Y *= A is equivalent to Y = Y * A	Try
Division Assignment (/ =)	It divides a variable by the value of the right operand and assigns the result to the variable.	Y /= A is equivalent to Y = Y / A	Try
Modules/Remainder Assignment (% =)	It divides a variable by the value of the right operand and assigns the remainder to the variable.	Y %= A is equivalent to Y = Y % A	Try
Exponentiation Assignment (** =)	This raises the value of a variable to the power of the right operand.	Y **= A is equivalent to Y=Y ** A	Try
Left Shift Assignment (<< =)	It moves the specified amount of bits to the left and assigns the result to the variable.	Y <<= A is equivalent to Y=Y << A	Try
Right Shift Assignment (>> =)	It moves the specified amount of bits to the right and assigns the result to the variable.	Y >>= A is equivalent to Y = Y >> A	Try
Bitwise AND Assignment (& =)	: It does a bitwise AND operation on the operand, and assigns the result to the variable.	Y &= b is equivalent to Y = Y & A	Try
Bitwise OR Assignment (| =)	It does a bitwise OR operation on the operand, and assigns the result to the variable.	Y |= A is equivalent to Y= Y | b	Try
Bitwise XOR Assignment (^ =)	It does a bitwise XOR operation on the operand, and assigns the result to the variable.	Y ^= A is equivalent to Y= Y ^ A	Try

JavaScript Comparison Operators

Comparison operators are mainly used to perform the logical operations that determine the equality or difference between the values.

Name	Description	Syntax	Example
Equality (==)	Compares the equality of two operands. If equal then the condition is true otherwise false.	Y = 5 and X = 6 Y = = X is false.	Try
Strict equality (===)	Compares the equality of two operands with type. If both value and type are equal then the condition is true otherwise false.	Y = 5 and X = ‘5’ Y = = = X is false.	Try
Inequality (!=)	Compares inequality of two operands. True if operands are not equal.	let X = 10 then X ! = 11 is true.	Try
Strict inequality(!==)	Compares the inequality of two operands with type. If both value and type are equal then the condition is true otherwise false.	let X = 10 then X ! == ’10’ is true.	Try
Greater than (>)	This operator checks whether the left side value is greater than the right side value. If yes then it returns true otherwise it returns false.	let X = 10 then X > 11 is false.	Try
Less than (<)	This operator checks whether the left side value is less than the right side value. If yes then it returns true otherwise it returns false.	let X = 10 then X < 11 is true.	Try
Greater than or Equal to (> =)	This operator checks whether the left side operand is greater than or equal to the right side operand. If yes then it returns true otherwise it returns false.	let X = 10 then X > = 11 is false.	Try
Less than or Equal to (<= )	This operator checks whether the left side operand value is less than or equal to the right side operand value. If yes then it returns true otherwise it returns false.	let X = 10 then X < = 10 is true.	Try

JavaScript Logical Operators

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

Name	Description	Syntax	Example
Logical AND (&&).	It checks whether two operands are non-zero (0, false, undefined, null, or “” are considered as zero), if yes then return the last operand when evaluating from left to right	Y = 5 and X = 6 Y && X is 6.	Try
Logical OR (||)	It checks whether two operands are non-zero (0, false, undefined, null, or “” is considered as zero), if yes then return the first operand when evaluating from left to right.	Y = 5 and X = 0 Y || X is 5.	Try
Logical NOT (!)	It reverses the boolean result of the operand (or condition).	Y = 5 and X = 0 !(Y || X) is false.	Try

JavaScript Bitwise Operators

The bitwise operator in JavaScript is used to convert the number to a 32-bit binary number and perform the bitwise operation. The number is converted back to the 64-bit number after the result. 

Name	Description	Syntax	Example
Bitwise AND(&)	The operator returns true only if both the operands are true	A = 6, B=1 A&B = 0	Try
Bitwise OR(|)	The operator returns true even if one of the operands is true	A = 6, B=1 A|B = 7	Try
Bitwise XOR(^)	The operator returns true if both operators are distinct	A = 6, B=1 A^B = 7	Try
Bitwise NOT(~)	This operator is used to invert the boolean value of the operand	A = 6 ~A = -7	Try
Bitwise Left Shift(<<)	In this two operators are used where the first operand is the number and the second operand is the number of bits to shift to the left.	A = 6, B=1 A<<B = 12	Try
Bitwise Right Shift(>>)	In this two operators are used where the first operand is the number and the second operand is the number of bits to shift to the right.	A = 6, B=1 A>>B = 3	Try
Zero Fill Right Shift(>>>)	It is same as a bitwise right shift the only difference is that overflowing bits are discarded.	A = 6, B=1 A>>>B = 3	Try

JavaScript Ternary Operators

The ternary operator has three operands. It is the simplified operator of if/else.

Name	Description	Syntax	Example
Ternary Operator(?):	It is like the short form of the if-else condition.	Y = ? A : B If the condition is true then Y = A otherwise Y = B	Try

JavaScript Comma Operators

Comma Operator (,) mainly evaluates its operands from left to right sequentially and returns the value of the rightmost operand. 

Name	Description	Syntax	Example
comma operator (,)	When a comma operator is placed in an expression, it executes each expression and returns the rightmost expression.	Expression1, Expression2, Expression3, …so on	Try

JavaScript Unary Operators

A unary operation is an operation with only one operand.

Name	Description	Syntax	Example
JavaScript typeof	It returns the operand type, The possible types that exist in javascript are undefined, Object, boolean, number, string, symbol, and function.	typeof variable	Try
Delete	This operator is more specifically used to delete JavaScript object properties.	delete object // or delete object.property // or delete object[‘property’]	Try

JavaScript Relational Operators

JavaScript Relational operators are used to compare its operands and determine the relationship between them. They return a Boolean value (true or false) based on the comparison result.

Name	Description	Syntax	Example
in	The in operator returns true if the specified property is in the specified object.	propNameOrNumber in objectName	Try
instanceof	The instanceof operator returns true if the specified object is of the specified object type.	objectName instanceof objectType	Try

JavaScript BigInt Operators

Most operators that can be used between numbers can be used between BigInt values as well.

Name	Description	Syntax	Example
BigInt	It returns a new BigInt object that represents the original value.	BigInt(value);	Try

JavaScript String Operators

Name	Description	Syntax	Example
concatenation operator (+)	It concatenates two string values together, returning another string that is the union of the two operand strings.	str1 + str2	Try

We have a list of JavaScript Operators reference where you can know more about these operators.