JavaScript

JavaScript provides comparison operators to compare values and logical operators to combine multiple conditions.

These are widely used in if statements, loops, and any kind of decision-making logic.

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🔍 Comparison Operators

Comparison operators compare two values and return a Boolean (true or false).

Operator	Description	Example	Result
==	Equal to	5 == "5"	true
===	Equal value and type	5 === "5"	false
!=	Not equal to	5 != 3	true
!==	Not equal value or type	5 !== "5"	true
>	Greater than	10 > 5	true
<	Less than	10 < 5	false
>=	Greater than or equal to	10 >= 10	true
<=	Less than or equal to	5 <= 3	false

Example:

console.log(7 == "7");   // true
console.log(7 === "7");  // false
console.log(5 > 3);      // true
console.log(5 < 3);      // false

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🔗 Logical Operators

Logical operators are used to combine multiple Boolean conditions.

Operator	Name	Description
&&	AND	True if both conditions are true
||	OR	True if at least one is true
!	NOT	Reverses the condition (true → false)

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Examples:

let age = 20;

console.log(age > 18 && age < 25);  // true (both true)
console.log(age > 25 || age < 30);  // true (one is true)
console.log(!(age > 18));           // false (negates true)

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🧪 Real-World Example

let isLoggedIn = true;
let hasPermission = false;

if (isLoggedIn && hasPermission) {
  console.log("Access granted");
} else {
  console.log("Access denied");
}

Output:

Access denied

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⚠️ Equality vs Strict Equality

• == allows type conversion
• === checks both value and type (more strict)

5 == "5"   // true
5 === "5"  // false

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🧠 Summary

• Comparison operators compare values and return Boolean.
• Logical operators combine conditions.
• Use === for safer comparisons (no type conversion).
• &&, ||, and ! are key tools for decision-making.

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