🌐 The Math Object in JavaScript

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🧠 1. Introduction to Math Object

The Math Object in JavaScript provides mathematical constants and functions for performing calculations.

👉 It is a built-in object and not a constructor, so it is used directly without creating an instance.

✅ Syntax:

Math.methodName(value);

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🔍 2. Characteristics of Math Object

• Static object (no need to create object)
• Contains constants and methods
• Used for numeric calculations
• Does not work with complex numbers

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🔢 3. Math Constants

Constant	Description	Example
Math.PI	Value of π	3.14159
Math.E	Euler’s number	2.718
Math.SQRT2	√2	1.414
Math.SQRT1_2	√(1/2)	0.707

💻 Example:

console.log(Math.PI);
console.log(Math.E);

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⚙️ 4. Important Math Methods

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🔼 (1) Math.round()

Rounds to nearest integer

console.log(Math.round(4.6)); // 5
console.log(Math.round(4.3)); // 4

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🔽 (2) Math.floor()

Rounds down

console.log(Math.floor(4.9)); // 4

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🔼 (3) Math.ceil()

Rounds up

console.log(Math.ceil(4.1)); // 5

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✂️ (4) Math.trunc()

Removes decimal part

console.log(Math.trunc(4.9)); // 4

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🔢 (5) Math.pow()

Power calculation

console.log(Math.pow(2, 3)); // 8

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√ (6) Math.sqrt()

Square root

console.log(Math.sqrt(16)); // 4

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🎲 (7) Math.random()

Generates random number (0 to 1)

console.log(Math.random());

🎯 Random Number Example:

let num = Math.floor(Math.random() * 10);
console.log(num); // 0–9

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🔝 (8) Math.max()

Returns largest value

console.log(Math.max(10, 20, 30)); // 30

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🔽 (9) Math.min()

Returns smallest value

console.log(Math.min(10, 20, 30)); // 10

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➕➖ (10) Math.abs()

Absolute value

console.log(Math.abs(-5)); // 5

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🔢 (11) Math.log()

Natural logarithm

console.log(Math.log(1)); // 0

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🔢 (12) Math.sin(), Math.cos(), Math.tan()

Trigonometric functions

console.log(Math.sin(0)); // 0
console.log(Math.cos(0)); // 1

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🔄 5. Complete Example

let num = 5.7;

console.log("Round:", Math.round(num));
console.log("Floor:", Math.floor(num));
console.log("Ceil:", Math.ceil(num));
console.log("Power:", Math.pow(2, 3));
console.log("Square Root:", Math.sqrt(25));
console.log("Random:", Math.random());
console.log("Max:", Math.max(10, 50, 30));
console.log("Min:", Math.min(10, 50, 30));

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🔄 6. Summary Table

Method	Purpose
round()	Nearest integer
floor()	Round down
ceil()	Round up
trunc()	Remove decimal
pow()	Power
sqrt()	Square root
random()	Random number
max()	Largest value
min()	Smallest value
abs()	Absolute value

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⚠️ 7. Important Notes

• Math object is static
• No need to use new Math()
• Used widely in:
  • Games (random numbers)
  • Calculations
  • Data analysis

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🎯 Conclusion

The Math Object is essential for:

• Performing mathematical operations
• Generating random values
• Implementing logic-based applications

👉 It is widely used in web applications, games, and data processing.

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