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# Interface NumberConstructor

### Hierarchy

• NumberConstructor

## Properties

### EPSILON

EPSILON: number

The value of Number.EPSILON is the difference between 1 and the smallest value greater than 1 that is representable as a Number value, which is approximately: 2.2204460492503130808472633361816 x 10‍−‍16.

### MAX_SAFE_INTEGER

MAX_SAFE_INTEGER: number

The value of the largest integer n such that n and n + 1 are both exactly representable as a Number value. The value of Number.MAX_SAFE_INTEGER is 9007199254740991 2^53 − 1.

### MIN_SAFE_INTEGER

MIN_SAFE_INTEGER: number

The value of the smallest integer n such that n and n − 1 are both exactly representable as a Number value. The value of Number.MIN_SAFE_INTEGER is −9007199254740991 (−(2^53 − 1)).

## Methods

### isFinite

• isFinite(number: number): boolean
• Returns true if passed value is finite. Unlike the global isFinite, Number.isFinite doesn't forcibly convert the parameter to a number. Only finite values of the type number, result in true.

#### Parameters

• ##### number: number

A numeric value.

### isInteger

• isInteger(number: number): boolean
• Returns true if the value passed is an integer, false otherwise.

#### Parameters

• ##### number: number

A numeric value.

### isNaN

• isNaN(number: number): boolean
• Returns a Boolean value that indicates whether a value is the reserved value NaN (not a number). Unlike the global isNaN(), Number.isNaN() doesn't forcefully convert the parameter to a number. Only values of the type number, that are also NaN, result in true.

#### Parameters

• ##### number: number

A numeric value.

### isSafeInteger

• isSafeInteger(number: number): boolean
• Returns true if the value passed is a safe integer.

#### Parameters

• ##### number: number

A numeric value.

### parseFloat

• parseFloat(string: string): number
• Converts a string to a floating-point number.

#### Parameters

• ##### string: string

A string that contains a floating-point number.

### parseInt

• parseInt(string: string, radix?: number): number
• Converts A string to an integer.