Comparison Operators
In javascript, the assignment operators are used to assign values to the variables.
| Operator | Description |
|---|---|
| == | Checks equality of 2 values |
| === | Checks equality of value and type |
| != | Checks whether 2 values are not equal |
| !== | Checks whether 2 values and their type are not equal |
| > | Greater than |
| < | Less than |
| >= | Greater than or equal to |
| <= | Less than or equal to |
| ? | Ternary operator |
Equality Operator (==)
This operator converts the operands if their types are different and then performs comparison on the values of the operands.
Example
console.log(1 == 1); // true
console.log("3" == 3); // true
console.log(3+"5" == 35) // true
console.log(0 == false); // true
console.log(0 == null); // false
console.log(0 == undefined); // false
console.log(null == undefined); // true
Strict Equality Operator (===)
This operator checks whether the value of the variable and the variable type are equals.
Example
console.log(1 === 1); // true
console.log("3" === 3); // false
console.log(3+"5" === 35) // false
console.log(0 === false); // false
console.log(0 === null); // false
console.log(0 === undefined); // false
console.log(null === undefined); // false
Inequality Operator (!=)
This operator, converts the operands type if they are of different type and checks whether their values are not equal. If they are not equal, then it will return true.
Example
console.log(1 != 2) ; // true
console.log(2 != "2"); // false
console.log(3 != '3' ); // false
console.log(1 != true); // false
console.log(0 != false); // false
Strict Inequality Operators(!==)
This operator is used to check whether their value/type of the 2 variables are not equal. If they are not equal then it will return true.
Example
let x=5;
console.log(x!=='5'); // true
Greater than operator(>)
This operator returns true, if the left operand value is greater than the right operand value.
Example
console.log(7>5); // true
Greater than or equal to operator(>=)
This operator returns true, if the left operand value is greater than or equal to the right operand value.
Example
console.log(7>=5); // true
console.log(5>=5); // true
Less than operator(<)
This operator returns true, if the left operand value is less than the right operand value.
Example
console.log(7<5); // false
console.log(4<5); // true
Less than or equal to operator(<=)
This operator returns true, if the left operand value is less than or equal to the right operand value.
Example
console.log(7<=5); // false
console.log(5<=5); // true