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JavaScript Number Reference

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JavaScript Numbers are always stored in double-precision 64-bit binary format IEEE 754. The types of number literals You can use decimal, binary, octal, and hexadecimal.




function func() {  
    // Original string
    let a = true;
    let value = Number(a);



The complete list of JavaScript Numbers is listed below:

JavaScript Number Constructor: In JavaScript, a constructor gets called when an object is created using the new keyword.

Number()Returns the number format for any type of javascript variable.

JavaScript Number Properties: A JavaScript property is a member of an object that associates a key with a value. There are two types of Number properties in JavaScript.

  • Static Property: A static property is a property that has the same value for the entire class.
Static PropertiesDescriptionExample
EPSILONShows the difference between 1 and the smallest floating point number which is greater than 1.
MAX_SAFE_INTEGERRepresents the maximum safe integer.
MAX_VALUERepresent maximum numeric values.
MIN_SAFE_INTEGERRepresents the minimum safe integer.
MIN_VALUERepresent minimum numeric values.
NaNRepresents a value that is not a valid number.
NEGATIVE_INFINITYRepresents the largest negative value i.e negative infinity.
POSITIVE_INFINITYRepresents the largest positive value i.e positive infinity.
  • Instance Property: An instance property is a property that has a new copy for every new instance of the class.
Instance PropertiesDescriptionExample
constructorReturn the number constructor function for the object.

JavaScript Number Methods: JavaScript methods are the actions that can be performed on objects. There are types of Number methods in JavaScript.

  • Static Method: If the method is called using the Number class itself then it is called a static method.
Static MethodsDescriptionExample
isNaN()Determine whether the passed value is NaN(Not a Number) and is of the type “Number”.
isFinite()Check whether the passed value is a finite number or not.
isInteger()Returns true if the passed value is an integer, otherwise false.
isSafeInteger()Check the provided value is a number that is a safe integer.
parseFloat()Accept the string and convert it into a floating-point number.
parseInt()Manipulate numbers whether it is negative or positive.
  • Instance Method: If the method is called on an instance of a number then it is called an instance method.
Instance MethodsDescriptionExample
toExponential()Returns a string representing the Number object in exponential notation.
toFixed()Format a number using fixed-point notation.
toLocaleString()Converts a number into a string, using a local language format.
toPrecision()Format a number to a specific precision or length.
toString()Return a string representing the specified Number object.
valueOf()Return the primitive value of a number.

Last Updated : 26 May, 2023
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