Logical Operators in JavaScript
Logical operators are used to evaluate resultant of 2 or more boolean values (conditions).
| Operator | Operation | Description |
|---|---|---|
| “&&” | and | Resultant of ‘and’ operation is ‘true’ when all the conditions are ‘true’. |
| “||” | or | Resultant of ‘or’ operation is ‘true’ when any of the conditions is ‘true’. |
| “!” | not | Inverts ‘true’ to ‘false’ and vice versa. |
Comparison Operators in JavaScript
Comparison operators are used to evaluate if 2 operands are equal, not equal, greater than, less than etc.
| Operator | Operation | Description |
|---|---|---|
| “==” | Equal | Returns ‘true’ when operand values are equal. |
| “===” | Strict Equal | Returns ‘true’ when operands value and type are equal. |
| “!=” | Not Equal | Returns ‘true’ when operands values are not equal. |
| “!==” | Strict Not Equal | Returns ‘true’ operands value and/or type are not equal. |
| “>” | Greater Than | Returns ‘true’ when left operand is greater than the right operand. |
| “<" | Less Than | Returns ‘true’ when left operand is less than the right operand. |
| “>=” | Greater Than or Equal | Returns ‘true’ when left operand is greater than or equal to the right operand. |
| “<=" | Less Than or Equal | Returns ‘true’ when left operand is less than or equal to the right operand. |