Number Properties

In JavaScript, the Number object provides several static properties that define important numerical constants and limits. These properties are accessed directly on Number rather than on individual numbers.

Number.EPSILON

Represents the smallest difference between 1 and the next representable floating-point number greater than 1.

It is approximately 2.220446049250313e-16.

console.log(Number.EPSILON); // 2.220446049250313e-16

Number.MAX_VALUE

The largest positive finite number representable in JavaScript, approximately 1.7976931348623157e+308.

Numbers exceeding this become Infinity.

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

Number.MIN_VALUE

The smallest positive number greater than 0, approximately 5e-324.

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

Number.MAX_SAFE_INTEGER

The largest integer that can be safely represented without losing precision: 9007199254740991 (2^53 - 1).

Beyond this value, integer arithmetic may lose accuracy due to floating-point limitations.

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

Number.MIN_SAFE_INTEGER

The smallest integer that can be safely represented: -9007199254740991 (-(2^53 - 1)).

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

Number.POSITIVE_INFINITY

Represents positive infinity, a value larger than any finite number.

Results from operations like dividing by zero:

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

Number.NEGATIVE_INFINITY

Represents negative infinity, a value smaller than any finite number.

Results from operations like dividing a negative number by zero:

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

Number.NaN

Represents “Not-a-Number”, indicating an invalid or undefined numerical result (e.g., 0 / 0 or Math.sqrt(-1)).

console.log(Number.NaN);       // NaN
console.log(0 / 0);            // NaN
console.log(Number.isNaN(NaN)); // true