Class Number

TopLevel.Object
- TopLevel.Number

A Number object represents any numerical value, whether it is an integer or floating-point number. Generally, you do not need to worry about a Number object because a numerical value automatically becomes a Number object instance when you use a numerical value or assign it to a variable.

Constant	Description
EPSILON: Number	EPSILON is the Number value for the magnitude of the difference between 1 and the smallest value greater than 1 that is representable as a Number value, which is approximately 2.2204460492503130808472633361816 × 10-16.
MAX_SAFE_INTEGER: Number	The maximum safe integer in JavaScript.
MAX_VALUE: Number	The largest representable Number.
MIN_SAFE_INTEGER: Number	The minimum safe integer in JavaScript.
MIN_VALUE: Number	The smallest representable Number.
NEGATIVE_INFINITY: Number	Negative infinite value; returned on overflow;
NaN: Number	Not a Number.
POSITIVE_INFINITY: Number	Negative infinite value; returned on overflow;

Constructor	Description
Number()	Constructs a Number with value 0
Number(Number)	Constructs a new Number using the specified Number.
Number(String)	Constructs a Number using the specified value.

Method	Description
static isFinite(Object)	Determines whether the passed value is a finite number.
static isInteger(Object)	Determines whether the passed value is an integer number.
static isNaN(Object)	Determines whether the passed value is `NaN`.
static isSafeInteger(Object)	Determines whether the passed value is a safe integer number.
static parseFloat(String)	Parses a String into an float Number.
static parseInt(String)	Parses a String into an integer Number.
static parseInt(String, Number)	Parses a String into an integer Number using the specified radix.
toExponential()	Converts this Number to a String using exponential notation.
toExponential(Number)	Converts this Number to a String using exponential notation with the specified number of digits after the decimal place.
toFixed()	Converts a Number to a String that contains a no fractional part.
toFixed(Number)	Converts a Number to a String that contains a specified number of digits after the decimal place.
toLocaleString()	Converts this Number to a String using local number formatting conventions.
toPrecision(Number)	Converts a Number to a String using the specified number of significant digits.
toString()	A String representation of this Number.
toString(Number)	Converts the number into a string using the specified radix (base).

assign, create, create, defineProperties, defineProperty, entries, freeze, fromEntries, getOwnPropertyDescriptor, getOwnPropertyNames, getOwnPropertySymbols, getPrototypeOf, hasOwnProperty, is, isExtensible, isFrozen, isPrototypeOf, isSealed, keys, preventExtensions, propertyIsEnumerable, seal, setPrototypeOf, toLocaleString, toString, valueOf, values

EPSILON: Number

EPSILON is the Number value for the magnitude of the difference between 1 and the smallest value greater than 1 that is representable as a Number value, which is approximately 2.2204460492503130808472633361816 × 10-16.

API Version:

Available from version 22.7.

MAX_SAFE_INTEGER: Number

The maximum safe integer in JavaScript.

API Version:

Available from version 21.2.

MAX_VALUE: Number: The largest representable Number.

MIN_SAFE_INTEGER: Number

The minimum safe integer in JavaScript.

API Version:

Available from version 21.2.

MIN_VALUE: Number: The smallest representable Number.

NEGATIVE_INFINITY: Number: Negative infinite value; returned on overflow;

NaN: Number: Not a Number.

POSITIVE_INFINITY: Number: Negative infinite value; returned on overflow;

Number(): Constructs a Number with value 0

Number(num: Number)

Constructs a new Number using the specified Number.

Parameters:

num - the Number to use.

Number(value: String)

Constructs a Number using the specified value.

Parameters:

value - the value to use when creating the Number.

static isFinite(value: Object): Boolean

Determines whether the passed value is a finite number.

Parameters:

value - The value to check.

Returns:

true if the passed value is a finite number, else false.

API Version:

Available from version 21.2.

static isInteger(value: Object): Boolean

Determines whether the passed value is an integer number.

Parameters:

value - The value to check.

Returns:

true if the passed value is a finite integer number, else false.

API Version:

Available from version 21.2.

static isNaN(value: Object): Boolean

Determines whether the passed value is NaN. Unlike the global function, the passed parameter is not converted to number before doing the check.

Parameters:

value - The value to check.

Returns:

true if the passed value is the NaN number value, else false.

API Version:

Available from version 21.2.

static isSafeInteger(value: Object): Boolean

Determines whether the passed value is a safe integer number.

Parameters:

value - The value to check.

Returns:

true if the passed value is a safe integer number, else false.

API Version:

Available from version 21.2.

static parseFloat(s: String): Number

Parses a String into an float Number.

Parameters:

s - the String to parse.

Returns:

Returns the float as a Number.

API Version:

Available from version 21.2.

static parseInt(s: String): Number

Parses a String into an integer Number. This function is a short form for the call to parseInt(String, Number) with automatic determination of the radix. If the string starts with "0x" or "0X" then the radix is 16. In all other cases the radix is 10.

Parameters:

s - the String to parse.

Returns:

Returns the integer as a Number.

API Version:

Available from version 21.2.

static parseInt(s: String, radix: Number): Number

Parses a String into an integer Number using the specified radix.

Parameters:

s - the String to parse.
radix - the radix to use.

Returns:

Returns the integer as a Number.

API Version:

Available from version 21.2.

toExponential(): String

Converts this Number to a String using exponential notation.

Returns:

a String using exponential notation.

toExponential(digits: Number): String

Converts this Number to a String using exponential notation with the specified number of digits after the decimal place.

Parameters:

digits - the number of digits after the decimal place.

Returns:

a String using exponential notation with the specified number of digits after the decimal place.

toFixed(): String

Converts a Number to a String that contains a no fractional part.

Returns:

a String representation of the number

toFixed(digits: Number): String

Converts a Number to a String that contains a specified number of digits after the decimal place.

Parameters:

digits - the number of digits after the decimal place.

Returns:

a String that contains a specified number of digits after the decimal place.

toLocaleString(): String

Converts this Number to a String using local number formatting conventions.

The current implementation actually only returns the same as toString().

Returns:

a String using local number formatting conventions.

toPrecision(precision: Number): String

Converts a Number to a String using the specified number of significant digits. Uses exponential or fixed point notation depending on the size of the number and the number of significant digits specified.

Parameters:

precision - the precision to use when converting the Number to a String.

Returns:

a String using the specified number of significant digits.

toString(): String

A String representation of this Number.

Returns:

a String representation of this Number.

toString(radix: Number): String

Converts the number into a string using the specified radix (base).

Parameters:

radix - the radix to use.

Returns:

a String representation of this Number.