JavaScript Operators
JavaScript operators are symbols that are used to perform operations on operands. For example:
Here, + is the arithmetic operator and = is the assignment operator.
There are following types of operators in JavaScript.
- Arithmetic Operators
- Comparison (Relational) Operators
- Bitwise Operators
- Logical Operators
- Assignment Operators
- Special Operators
JavaScript Arithmetic Operators
Arithmetic operators are used to perform arithmetic operations on the operands. The following operators are known as JavaScript arithmetic operators.
| Operator | Description | Example |
|---|
| + | Addition | 10+20 = 30 |
| - | Subtraction | 20-10 = 10 |
| * | Multiplication | 10*20 = 200 |
| / | Division | 20/10 = 2 |
| % | Modulus (Remainder) | 20%10 = 0 |
| ++ | Increment | var a=10; a++; Now a = 11 |
| -- | Decrement | var a=10; a--; Now a = 9 |
JavaScript Comparison Operators
The JavaScript comparison operator compares the two operands. The comparison operators are as follows:
| Operator | Description | Example |
|---|
| == | Is equal to | 10==20 = false |
| === | Identical (equal and of same type) | 10==20 = false |
| != | Not equal to | 10!=20 = true |
| !== | Not Identical | 20!==20 = false |
| > | Greater than | 20>10 = true |
| >= | Greater than or equal to | 20>=10 = true |
| < | Less than | 20<10 = false |
| <= | Less than or equal to | 20<=10 = false |
JavaScript Bitwise Operators
The bitwise operators perform bitwise operations on operands. The bitwise operators are as follows:
| Operator | Description | Example |
|---|
| & | Bitwise AND | (10==20 & 20==33) = false |
| | | Bitwise OR | (10==20 | 20==33) = false |
| ^ | Bitwise XOR | (10==20 ^ 20==33) = false |
| ~ | Bitwise NOT | (~10) = -10 |
| << | Bitwise Left Shift | (10<<2) = 40 |
| >> | Bitwise Right Shift | (10>>2) = 2 |
| >>> | Bitwise Right Shift with Zero | (10>>>2) = 2 |
JavaScript Logical Operators
The following operators are known as JavaScript logical operators.
| Operator | Description | Example |
|---|
| && | Logical AND | (10==20 && 20==33) = false |
| || | Logical OR | (10==20 || 20==33) = false |
| ! | Logical Not | !(10==20) = true |
JavaScript Assignment Operators
The following operators are known as JavaScript assignment operators.
| Operator | Description | Example |
|---|
| = | Assign | 10+10 = 20 |
| += | Add and assign | var a=10; a+=20; Now a = 30 |
| -= | Subtract and assign | var a=20; a-=10; Now a = 10 |
| *= | Multiply and assign | var a=10; a*=20; Now a = 200 |
| /= | Divide and assign | var a=10; a/=2; Now a = 5 |
| %= | Modulus and assign | var a=10; a%=2; Now a = 0 |
JavaScript Special Operators
The following operators are known as JavaScript special operators.
| Operator | Description |
|---|
| (?:) | 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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