JavaScript

In JavaScript, the Number object comes with built-in properties that help us understand the limits and special values of numbers in JavaScript.

These properties are static, meaning they are accessed using Number.propertyName, not on number instances.

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✅ 1. Number.MAX_VALUE

Returns the largest possible number in JavaScript.

console.log(Number.MAX_VALUE); 
// Output: 1.7976931348623157e+308

Any number larger than this is considered Infinity.

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✅ 2. Number.MIN_VALUE

Returns the smallest positive number (closest to 0, not negative).

console.log(Number.MIN_VALUE);
// Output: 5e-324

It is not the most negative number — it’s the smallest you can go before getting 0.

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✅ 3. Number.POSITIVE_INFINITY

Represents positive infinity.

console.log(Number.POSITIVE_INFINITY); // Infinity
console.log(1 / 0);                    // Infinity

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✅ 4. Number.NEGATIVE_INFINITY

Represents negative infinity.

console.log(Number.NEGATIVE_INFINITY); // -Infinity
console.log(-1 / 0);                   // -Infinity

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✅ 5. Number.NaN

Represents the special value “Not-a-Number”.

console.log(Number.NaN);         // NaN
console.log("abc" * 3);          // NaN
console.log(isNaN("abc" * 3));   // true

Note: You can also use the global NaN keyword. Number.NaN === NaN is true.

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✅ 6. Number.MAX_SAFE_INTEGER

The largest integer you can safely represent in JavaScript without losing precision.

console.log(Number.MAX_SAFE_INTEGER); 
// Output: 9007199254740991

Beyond this, integers may lose accuracy. Use BigInt for very large numbers.

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✅ 7. Number.MIN_SAFE_INTEGER

The smallest safe integer in JavaScript.

console.log(Number.MIN_SAFE_INTEGER); 
// Output: -9007199254740991

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📌 All Number Properties – Summary Table

Property Name	Description	Example Output
Number.MAX_VALUE	Largest possible number	1.7976931348623157e+308
Number.MIN_VALUE	Smallest positive number	5e-324
Number.POSITIVE_INFINITY	Represents positive infinity	Infinity
Number.NEGATIVE_INFINITY	Represents negative infinity	-Infinity
Number.NaN	Not a Number	NaN
Number.MAX_SAFE_INTEGER	Largest safe integer (for precision)	9007199254740991
Number.MIN_SAFE_INTEGER	Smallest safe integer	-9007199254740991

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🧠 Important Notes

• These properties are read-only.
• They are accessed through the Number object, not from number instances.
• For extremely large or small numbers, JavaScript may return Infinity or 0.

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