Comparison Operators in JavaScript

 

Comparison operators in JavaScript are used to compare two values and return a boolean result (true or false). They are essential for making decisions in your code.

 

1. Equality (==)

The equality operator checks if two values are equal, performing type coercion if necessary.

 

Syntax

value1 == value2;

 

Example

console.log(5 == '5'); // Output: true

 

In this example, 5 (number) is compared to '5' (string). Due to type coercion, they are considered equal.

 

2. Strict Equality (===)

The strict equality operator checks if two values are equal and of the same type, without performing type coercion.

 

Syntax

value1 === value2;

 

Example

console.log(5 === '5'); // Output: false

 

Here, 5 (number) is not strictly equal to '5' (string) because their types are different.

 

3. Inequality (!=)

The inequality operator checks if two values are not equal, performing type coercion if necessary.

 

Syntax

value1 != value2;

 

Example

console.log(5 != '5'); // Output: false

 

In this case, 5 and '5' are considered equal due to type coercion, so the result is false.

 

4. Strict Inequality (!==)

The strict inequality operator checks if two values are not equal or not of the same type, without performing type coercion.

 

Syntax

value1 !== value2;

 

Example

console.log(5 !== '5'); // Output: true

 

Here, 5 (number) is strictly not equal to '5' (string) because their types differ.

 

5. Greater Than (>)

The greater than operator checks if one value is greater than another.

 

Syntax

value1 > value2;

 

Example

console.log(10 > 5); // Output: true

 

In this example, 10 is greater than 5, so the result is true.

 

6. Greater Than or Equal To (>=)

The greater than or equal to operator checks if one value is greater than or equal to another.

 

Syntax

value1 >= value2;

 

Example

console.log(10 >= 10); // Output: true

 

Here, 10 is equal to 10, so the result is true.

 

7. Less Than (<)

The less than operator checks if one value is less than another.

 

Syntax

value1 < value2;

 

Example

console.log(5 < 10); // Output: true

 

In this case, 5 is less than 10, so the result is true.

 

8. Less Than or Equal To (<=)

The less than or equal to operator checks if one value is less than or equal to another.

 

Syntax

value1 <= value2;

 

Example

console.log(5 <= 5); // Output: true

 

Here, 5 is equal to 5, so the result is true.

 

These operators are fundamental for making comparisons and decisions in JavaScript.

 

Find the below application.

 

comparisonOperators.js 

console.log(`5 == '5' : ${5 == '5'}`);
console.log(`5 == 5 : ${5 == 5}`);
console.log(`5 === '5' : ${5 === '5'}`);
console.log(`5 != '5' : ${5 != '5'}`);
console.log(`5 != 5 : ${5 != 5}`);
console.log(`5 !== '5' : ${5 !== '5'}`);
console.log(`10 > 5 : ${10 > 5}`);
console.log(`10 >= 10 : ${10 >= 10}`);
console.log(`5 < 10 : ${5 < 10}`);
console.log(`5 <= 5 : ${5 <= 5}`);

 

Output

5 == '5' : true
5 == 5 : true
5 === '5' : false
5 != '5' : false
5 != 5 : false
5 !== '5' : true
10 > 5 : true
10 >= 10 : true
5 < 10 : true
5 <= 5 : true

 

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