JavaScript Operator

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JavaScript Operator are symbols that are used to perform operations on operands.

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Types of JavaScript Operator

• Arithmetic Operators
• Comparison (Relational) Operators
• Bitwise Operators
• Logical Operators
• Assignment Operators
• Special Operators

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Arithmetic Operators

Arithmetic operators are used to perform arithmetic operations on the operands.

• + :Addition
• – :Substraction
• * :Multiplication
• / :Divide
• % :Modulus(Remainder)
• — :Decrement. Example: var a=10; a–; Now a = 9
• ++ :Increment. Example: var a=10; a++; Now a = 11

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Comparison Operators

The JavaScript comparison operator compares the two operands.

• == :Is equal to. Example: 10==20 = false
• === :Identical (equal and of same type). Example: 10==20 = false
• != :Not equal to. Example: 10!=20 = true
• !== :Not Identical. Example: 20!==20 = false
• > :Greater than. Example: 20>10 = true
• >= :Greater than or equal to. Example: 20>=10 = true
• < :Less than. Example: 20<10 = false
• <= :Less than or equal to. Example: 20<=10 = false

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Bitwise Operators

The bitwise operators perform bitwise operations on operands. The bitwise operators are as follows:

• & :Bitwise AND. Example: (10==20 & 20==33) = false
• | :Bitwise OR. Example: (10==20 | 20==33) = false
• ^ :Bitwise XOR. Example: (10==20 ^ 20==33) = false
• ~ :Bitwise NOT. Example: (~10) = -10
• << :Bitwise Left Shift. Example: (10<<2) = 40
• >> :Bitwise Right Shift. Example: (10>>2) = 2
• >>> :Bitwise Right Shift with Zero. Example: (10>>>2) = 2

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Logical Operators

The following operators are known as JavaScript logical operators.

• && :Logical AND. Example: (10==20 && 20==33) = false
• || :Logical OR. Example: (10==20 || 20==33) = false
• ! :Logical Not. Example: !(10==20) = true

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Assignment Operators

The following operators are known as JavaScript assignment operators.

• = :Assign. Example: 10+10 = 20
• += :Add and assign. Example: var a=10; a+=20; Now a = 30
• -= :Subtract and assign. Example: var a=20; a-=10; Now a = 10
• *= :Multiply and assign. Example: var a=10; a*=20; Now a = 200
• /= :Divide and assign. Example: var a=10; a/=2; Now a = 5
• %= :Modulus and assign. Example: var a=10; a%=2; Now a = 0

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Special Operators

The following operators are known as JavaScript special operators.

• (?:) :Conditional Operator returns value based on the condition. It is like if-else.
• , :Comma Operator allows multiple expressions to be evaluated as single statement.
• delete :Delete Operator deletes a property from the object.
• in :In Operator checks if object has the given property
• instanceof :checks if the object is an instance of given type
• new :creates an instance (object)
• typeof :checks the type of object.
• void :it discards the expression’s return value.
• yield:checks what is returned in a generator by the generator’s iterator.

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