JavaScript Date & Math Objects

📆 Date Object

The Date object in JavaScript is used to work with **dates and times**. It can be used to get the current date, time, calculate differences, format time, etc.

Creating Date Objects:

const now = new Date();
const specific = new Date('2025-08-05T10:30:00');

Useful Date Methods:

• getFullYear() → Returns the 4-digit year
• getMonth() → Month (0-11)
• getDate() → Day of the month
• getHours(), getMinutes(), getSeconds()
• getTime() → Timestamp (ms since Jan 1, 1970)
• toLocaleDateString() → Format date nicely

Popular Use Cases:

• Get current timestamp for logs or analytics
• Show booking or order dates
• Countdown timers
• Calculate age or date difference

Example:

const now = new Date();
console.log(now.toLocaleDateString()); // 8/5/2025
console.log(now.getFullYear()); // 2025

📚 Reference: MDN Web Docs - Date

🧮 Math Object

The Math object provides basic mathematics functions and constants. It's used for rounding, generating random numbers, getting min/max, etc.

Popular Math Methods:

• Math.random() → Returns a random number between 0 and 1
• Math.floor() → Rounds down
• Math.ceil() → Rounds up
• Math.round() → Rounds to nearest
• Math.max(), Math.min() → Highest/Lowest number in a list
• Math.abs() → Absolute value
• Math.pow(x, y) → x to the power of y
• Math.sqrt(x) → Square root

Common Use Cases:

• Generate random OTP, game values, IDs
• Price rounding in shopping apps
• Calculations in animations or layouts
• Min/Max checks for inputs

Example:

const otp = Math.floor(Math.random() * 9000 + 1000); // 4-digit OTP
console.log(otp); // e.g., 4821

console.log(Math.max(10, 2, 99)); // 99

📚 Reference: MDN Web Docs - Math