Comparison Operators in JavaScript

Comparison operators are used to compare the value of a variable with another value. The result of such comparisons is a boolean value: either true or false.

1. Relational Operators

Relational operators compare two values and determine the relational aspect between them.

Greater Than (>)

Checks if the value on the left is greater than the value on the right.

let x = 1;
console.log(x > 0); // Output: true
Greater Than or Equal To (>=)

Checks if the value on the left is greater than or equal to the value on the right.

console.log(x >= 1); // Output: true
Less Than (<)

Checks if the value on the left is less than the value on the right.

console.log(x < 1); // Output: false
Less Than or Equal To (<=)

Checks if the value on the left is less than or equal to the value on the right.

console.log(x <= 1); // Output: true
Example Code for Relational Operators
let x = 1;

// Relational Operators
console.log(x > 0);  // true
console.log(x >= 1); // true
console.log(x < 1);  // false
console.log(x <= 1); // true

2. Equality Operators

Equality operators check if values are equal or not equal.

Strict Equality (===)

Checks if the value on the left is strictly equal to the value on the right. This means both the value and the type must be the same.

console.log(x === 1); // Output: true
Strict Inequality (!==)

Checks if the value on the left is not equal to the value on the right.

console.log(x !== 1); // Output: false
Example Code for Equality Operators
let x = 1;

// Equality Operators
console.log(x === 1); // true
console.log(x !== 1); // false

Summary

In JavaScript, comparison operators include:

  • Greater Than (>): Checks if the value on the left is greater than the value on the right.
  • Greater Than or Equal To (>=): Checks if the value on the left is greater than or equal to the value on the right.
  • Less Than (<): Checks if the value on the left is less than the value on the right.
  • Less Than or Equal To (<=): Checks if the value on the left is less than or equal to the value on the right.
  • Strict Equality (===): Checks if the value on the left is strictly equal to the value on the right.
  • Strict Inequality (!==): Checks if the value on the left is not equal to the value on the right.

Understanding these operators allows you to make comparisons in your code, which is essential for decision-making and control flow in programming.