Operators
JavaScript has following operator categories
Arithmetic Operators
| Operator | Description | JS Example |
|---|
| + | Addition | a + b |
| – | Subtraction | a - b |
| * | Multiplication | a * b |
| ** | Exponentiation | a ** b |
| / | Division | a / b |
| % | Modulus | a % b |
| ++ | Increment | a++ |
| — | Decrement | a-- |
Assignment Operators
| Operator | Description | JS Example | Equivalent to |
|---|
| = | Assignment | a = 4 | |
| += | Addition Assignment | a += b | a = a + b; |
| – | Subtraction Assignment | a -= b | a = a - b; |
| * | Multiplication Assignment | a *= b | a = a * b; |
| ** | Exponentiation Assignment | a **= b | a = a ** b; |
| / | Division Assignment | a /= b | a = a / b; |
| % | Modulus Assignment | a %= b | a = a % b; |
Comparison Operators
| Operator | Description | JS Example |
|---|
| == | equal to | a == b |
| === | equal value and equal type | a === b |
| != | not equal | a != b |
| !== | not equal value or not equal type | a !== b |
| > | greater than | a > b |
| < | less than | a < b |
| >= | greater than or equal to | a >= b |
| <= | less than or equal to | a <= b |
| ? | ternary operator | x = condition? a: b |
Logical Operators
| Operator | Description | JS Example |
|---|
| && | and | (a == 2) && (b == 5) |
| || | or | (a == 2) || (b == 5) |
| ! | not | !(a == 2) |
Type Operators
| Operator | Description | JS Example |
|---|
| typeof | returns type of variable | a = 5;
console.log(typeof a); |
| instanceof | returns true if given object is an instance of specified type | var a = new String('apple');
console.log(a instanceof String); |
Bitwise Operators
| Operator | Description | JS Example |
|---|
| & | AND | a & b |
| | | OR | a | b |
| ~ | NOT | ~a |
| ^ | XOR | a ^ b |
| << | left shift | a << b |
| >> | right shift | a >> b |
| >>> | unsigned right shift | a >>> b |
