JavaScript Operators

What is an Operator?

Let’s take the simple expression 4 + 5 equals 9. Here, 4 and 5 are called operands and ‘+’ is called operator. JavaScript supports these user types.

• Arithmetic Operators
• Comparison Operators
• Logical (or Relational) Operators
• Assignment Operators
• Conditional (or ternary) Operators

Let’s look at all the users one by one.

Arithmetic Operators

Comparison Operators

Logical Operators

Sr.No.	Operator & Description
1	&& (Logical AND) If both the operands are non-zero, then the condition becomes true. Ex: (A && B) is true.
2	|| (Logical OR) If any of the two operands are non-zero, then the condition becomes true. Ex: (A || B) is true.
3	! (Logical NOT) Reverses the logical state of its operand. If a condition is true, then the Logical NOT operator will make it false. Ex: ! (A && B) is false.

Bitwise Operators

Sr.No.	Operator & Description
1	& (Bitwise AND) It performs a Boolean AND operation on each bit of its integer arguments. Ex: (A & B) is 2.
2	| (BitWise OR) It performs a Boolean OR operation on each bit of its integer arguments. Ex: (A | B) is 3.
3	^ (Bitwise XOR) It performs a Boolean exclusive OR operation on each bit of its integer arguments. Exclusive OR means that either operand one is true or operand two is true, but not both. Ex: (A ^ B) is 1.
4	~ (Bitwise Not) It is a unary operator and operates by reversing all the bits in the operand. Ex: (~B) is -4.
5	<< (Left Shift) It moves all the bits in its first operand to the left by the number of places specified in the second operand. New bits are filled with zeros. Shifting a value left by one position is equivalent to multiplying it by 2, shifting two positions is equivalent to multiplying by 4, and so on. Ex: (A << 1) is 4.
6	>> (Right Shift) Binary Right Shift Operator. The left operand’s value is moved right by the number of bits specified by the right operand. Ex: (A >> 1) is 1.
7	>>> (Right shift with Zero) This operator is just like the >> operator, except that the bits shifted in on the left are always zero. Ex: (A >>> 1) is 1.

Assignment Operators

Sr.No.	Operator & Description
1	= (Simple Assignment ) Assigns values from the right side operand to the left side operand Ex: C = A + B will assign the value of A + B into C
2	+= (Add and Assignment) It adds the right operand to the left operand and assigns the result to the left operand. Ex: C += A is equivalent to C = C + A
3	−= (Subtract and Assignment) It subtracts the right operand from the left operand and assigns the result to the left operand. Ex: C -= A is equivalent to C = C – A
4	*= (Multiply and Assignment) It multiplies the right operand with the left operand and assigns the result to the left operand. Ex: C *= A is equivalent to C = C * A
5	/= (Divide and Assignment) It divides the left operand with the right operand and assigns the result to the left operand. Ex: C /= A is equivalent to C = C / A
6	%= (Modules and Assignment) It takes modulus using two operands and assigns the result to the left operand. Ex: C %= A is equivalent to C = C % A

Miscellaneous Operator

We will discuss here two useful operators in JavaScript: the conditional operator and the type operator.

Conditional Operator

A conditional checker first evaluates an expression for a true or false value and then evaluates one of two given statements based on the result of the evaluation.

Sr.No.	Operator and Description
1	? : (Conditional ) If Condition is true? Then value X : Otherwise value Y

Type of Operator

An operator type is a random operator placed in front of one of its operands, which can be of any type. Its value is a string indicating the data type of the operand.

The operator type evaluates to “number”, “string”, or “boolean” if its operand is a number, string, or boolean, and returns true or false based on the evaluation.

This is the types of operator

Type	String Returned by typeof
Number	“number”
String	“string”
Boolean	“boolean”
Object	“object”
Function	“function”
Undefined	“undefined”
Null	“object”