JavaScript Comparison

The JavaScript compare values using comparison operators to determine their relationship or equality. Here are the commonly used comparison operators in JavaScript:

1. Equal to (==): Checks if two values are equal, performing type coercion if necessary. For example:

console.log(5 == 5);  // true
console.log('5' == 5);  // true (coerced to the same value)
console.log(5 == '5');  // true (coerced to the same value)

2. Not equal to (!=): Checks if two values are not equal, performing type coercion if necessary. For example:

console.log(5 != 3);  // true
console.log('5' != 5);  // false (coerced to the same value)
console.log(5 != '5');  // false (coerced to the same value)

3. Strict equal to (===): Checks if two values are equal without performing type coercion. It compares both the value and the type. For example:

console.log(5 === 5);  // true
console.log('5' === 5);  // false (different types)
console.log(5 === '5');  // false (different types)

4. Strict not equal to (!==): Checks if two values are not equal without performing type coercion. It compares both the value and the type. For example:

console.log(5 !== 3);  // true
console.log('5' !== 5);  // true (different types)
console.log(5 !== '5');  // true (different types)

5. Greater than (>): Checks if the left operand is greater than the right operand. For example:

console.log(5 > 3);  // true
console.log(5 > 10);  // false

6. Less than (<): Checks if the left operand is less than the right operand. For example:

console.log(5 < 10);  // true
console.log(5 < 3);  // false

7. Greater than or equal to (>=): Checks if the left operand is greater than or equal to the right operand. For example:

console.log(5 >= 3);  // true
console.log(5 >= 5);  // true
console.log(5 >= 10);  // false

8. Less than or equal to (<=): Checks if the left operand is less than or equal to the right operand. For example:

console.log(5 <= 10);  // true
console.log(5 <= 5);  // true
console.log(5 <= 3);  // false

These comparison operators return a boolean value (true or false) based on the comparison result. Keep in mind the differences between == and ===, as well as != and !==, which involve type coercion.

Additionally, you can use logical operators (&&, ||, !) to combine or negate comparison expressions for more complex conditions.