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TopLevel
Class Number
Object
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.
Constants
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.
NaN  :  Number
Not a Number.
NEGATIVE_INFINITY  :  Number
Negative infinite value; returned on overflow;
POSITIVE_INFINITY  :  Number
Negative infinite value; returned on overflow;
Properties
Constructor Summary
Number()
Constructs a Number with value 0
Number(num : Number)
Constructs a new Number using the specified Number.
Number(value : String)
Constructs a Number using the specified value.
Method Summary
static isFinite(value : Object) : boolean
Determines whether the passed value is a finite number.
static isInteger(value : Object) : boolean
Determines whether the passed value is an integer number.
static isNaN(value : Object) : boolean
Determines whether the passed value is NaN.
static isSafeInteger(value : Object) : boolean
Determines whether the passed value is a safe integer number.
static parseFloat(s : String) : Number
Parses a String into an float Number.
static parseInt(s : String) : Number
Parses a String into an integer Number.
static parseInt(s : String, radix : Number) : Number
Parses a String into an integer Number using the specified radix.
toExponential() : String
Converts this Number to 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.
toFixed() : String
Converts a Number to a String that contains a no fractional part.
toFixed(digits : Number) : String
Converts a Number to 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.
toPrecision(precision : Number) : String
Converts a Number to a String using the specified number of significant digits.
toString() : String
A String representation of this Number.
toString(radix : Number) : String
Converts the number into a string using the specified radix (base).
Methods inherited from class Object
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
Constructor Detail
Number
public Number()
Constructs a Number with value 0
Number
public Number(num : Number)
Constructs a new Number using the specified Number.
Parameters:
num - the Number to use.
Number
public Number(value : String)
Constructs a Number using the specified value.
Parameters:
value - the value to use when creating the Number.
Method Detail
isFinite
static isFinite(value : Object) : boolean
Determines whether the passed value is a finite number.
API Versioned:
From version 21.2.
Parameters:
value - The value to check.
Returns:
true if the passed value is a finite number, else false.
isInteger
static isInteger(value : Object) : boolean
Determines whether the passed value is an integer number.
API Versioned:
From version 21.2.
Parameters:
value - The value to check.
Returns:
true if the passed value is a finite integer number, else false.
isNaN
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.
API Versioned:
From version 21.2.
Parameters:
value - The value to check.
Returns:
true if the passed value is the NaN number value, else false.
isSafeInteger
static isSafeInteger(value : Object) : boolean
Determines whether the passed value is a safe integer number.
API Versioned:
From version 21.2.
Parameters:
value - The value to check.
Returns:
true if the passed value is a safe integer number, else false.
parseFloat
static parseFloat(s : String) : Number
Parses a String into an float Number.
API Versioned:
From version 21.2.
Parameters:
s - the String to parse.
Returns:
Returns the float as a Number.
parseInt
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.
API Versioned:
From version 21.2.
Parameters:
s - the String to parse.
Returns:
Returns the integer as a Number.
parseInt
static parseInt(s : String, radix : Number) : Number
Parses a String into an integer Number using the specified radix.
API Versioned:
From version 21.2.
Parameters:
s - the String to parse.
radix - the radix to use.
Returns:
Returns the integer as a Number.
toExponential
toExponential() : String
Converts this Number to a String using exponential notation.
Returns:
a String using exponential notation.
toExponential
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
toFixed() : String
Converts a Number to a String that contains a no fractional part.
Returns:
a String representation of the number
toFixed
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
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
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
toString() : String
A String representation of this Number.
Returns:
a String representation of this Number.
toString
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.
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