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4.2.3 JS Number Properties

Property	Description
EPSILON	The difference between 1 and the smallest number > 1.
MAX_VALUE	The largest number possible in JavaScript
MIN_VALUE	The smallest number possible in JavaScript
MAX_SAFE_INTEGER	The maximum safe integer (253 - 1)
MIN_SAFE_INTEGER	The minimum safe integer -(253 - 1)
POSITIVE_INFINITY	Infinity (returned on overflow)
NEGATIVE_INFINITY	Negative infinity (returned on overflow)
NaN	A "Not-a-Number" value

JavaScript EPSILON

Number.EPSILON is the difference between the smallest floating point number greater than 1 and 1.

Example

let x = Number.EPSILON;

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Note

Number.EPSILON is an ES6 feature.
It does not work in Internet Explorer.

JavaScript MAX_VALUE

Number.MAX_VALUE is a constant representing the largest possible number in JavaScript.

Example

let x = Number.MAX_VALUE;

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Number Properties Cannot be Used on Variables

Number properties belong to the JavaScript Number Object.
These properties can only be accessed as Number.MAX_VALUE.
Using x.MAX_VALUE, where x is a variable or a value, will return undefined:

Example

 let x = 6;
x.MAX_VALUE

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JavaScript MIN_VALUE

Number.MIN_VALUE is a constant representing the lowest possible number in JavaScript.

Example

let x = Number.MIN_VALUE;

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JavaScript MAX_SAFE_INTEGER

Number.MAX_SAFE_INTEGER represents the maximum safe integer in JavaScript.
Number.MAX_SAFE_INTEGER is (2⁵³ - 1).

Example

let x = Number.MAX_SAFE_INTEGER;

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JavaScript MIN_SAFE_INTEGER

Number.MIN_SAFE_INTEGER represents the minimum safe integer in JavaScript.
Number.MIN_SAFE_INTEGER is -(2⁵³ - 1).

Example

let x = Number.MIN_SAFE_INTEGER;

Try it yourself

Note

MAX_SAFE_INTEGER and MIN_SAFE_INTEGER are ES6 features.
They do not work in Internet Explorer.

JavaScript POSITIVE_INFINITY

Example

let x = Number.POSITIVE_INFINITY;

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POSITIVE_INFINITY is returned on overflow:

let x = 1 / 0;

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JavaScript NEGATIVE_INFINITY

Example

let x = Number.NEGATIVE_INFINITY;

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NEGATIVE_INFINITY is returned on overflow:

let x = -1 / 0;

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JavaScript NaN - Not a Number

NaN is a JavaScript reserved word for a number that is not a legal number.

Example

let x = Number.NaN;

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Trying to do arithmetic with a non-numeric string will result in NaN (Not a Number):

let x = 100 / "Apple";

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Module 4. Data Types

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Example files created in this module:
JS Strings part 1 JS Strings part 2 JS Strings part 3 JS Strings length Property JS Strings the escape sequence \" JS Strings the escape sequence \' JS Strings the escape sequence \\ JS Statements JS Strings line break JS Strings line break + JS Strings line break NOT JS Strings typeof JS Strings - equal value JS Strings - not equal type JS Strings - cannot compare Objects JS Strings - Objects cannot be compared JS Strings slice() JS Strings The slice() Method part 1 JS Strings The slice() Method part 2 JS Strings The slice() Method part 3 JS Strings the substring() method JS Strings the substr() method part 1 JS Strings the substr() method part 2 JS Strings the substr() method part 3 JS Strings the replace() method part 1 JS Strings the replace() method part 2 JS Strings the replace() method part 3 Mobile test of using JS CSS JS Strings the replace() method part 4 JS Strings the replace() method part 5 JS Strings Convert string part 1 JS Strings Convert string part 2 JS Strings Convert string part 3 JS Strings Convert string part 4 JS Strings The padStart() Method part 1 JS Strings The padStart() Method part 2 JS Strings The padStart() Method part 3 JS Strings The padEnd() Method part 1 JS Strings The padEnd() Method part 2 JS Strings The padEnd() Method part 3 JS Strings The charAt() Method JS Strings The charCodeAt() Method JS Strings Property Access part 1 JS Strings Property access part 2 JS String Methods String split() part 1 JS String Methods String split() part 2 JS String The indexOf() Method JS Numbers part 1 JS Numbers part 2 JS Numbers part 3 Floating Point Precision part 1 Floating Point Precision part 2 Numbers and Strings part 1 Numbers and Strings part 2 Numbers and Strings part 3 Numbers and Strings part 4 Numbers and Strings part 5 Numbers and Strings part 6 Numbers and Strings part 7 Numbers and Strings part 8 JS Numbers, NaN (Not a Number) part 1 JS Numbers, NaN (Not a Number) part 2 JS Numbers, NaN (Not a Number) part 3 JS Numbers, NaN (Not a Number) part 4 JS Numbers, NaN (Not a Number) part 5 JS Numbers, NaN (Not a Number) part 6 JS Numbers Infinity part 1 JS Numbers Infinity part 2 JS Numbers Infinity part 3 JS Numbers - Hexadecimal part 1 JS Numbers - Hexadecimal part 2 JS Numbers As Objects part 1 JS Numbers As Objects part 2 JS Numbers As Objects part 3 JS Numbers As Objects part 4 JS Number Methods part 1 JS Number Methods part 2 JS Number Methods part 3 JS Number Methods part 4 JS Number Methods part 5 JS Number Methods part 6 JS Number Methods part 7 JS Number Methods part 8 JS Number Methods part 9 JS Number Methods MAX_VALUE Property JS Number Methods MIN_VALUE Property JS Number Methods POSITIVE_INFINITY Property part 1 JS Number Methods POSITIVE_INFINITY Property part 2 JS Number Methods NEGATIVE_INFINITY Property part 1 JS Number Methods NEGATIVE_INFINITY Property part 2 JS Number Methods NaN part 1 JS Number Methods NaN part 2 JS Number Methods Number Properties JS Arrays part 1 JS Arrays part 2 JS Arrays part 3 JS Arrays part 4 JS Arrays part 5 JS Arrays part 6 JS Arrays part 7 JS Arrays part 8 JS Arrays part 9 JS Arrays part 10 JS Arrays part 11 JS Arrays part 12 JS Arrays part 13 JS Arrays part 14 JS Arrays part 15 JS Arrays part 16 JS Arrays part 17 JS Arrays part 18 JS Arrays part 19 JS Arrays part 20 JS Arrays part 21 JS Arrays isArray() Method JS Arrays isArray() function JS Arrays The instanceof Operator JS Arrays The toString() Method JS Arrays The join() Method JS Arrays The pop() Method part 1 JS Arrays The pop() Method part 2 JS Arrays The push() Method part 1 JS Arrays The push() Method part 2 JS Arrays The shift() Method part 1 JS Arrays The shift() Method part 2 JS Arrays The shift() Method part 3 JS Arrays The shift() Method part 4 JS Arrays Bracket Indexing JS Arrays The length Property JS Arrays The delete Method JS Arrays The splice() Method part 1 JS Arrays The splice() Method part 2 JS Arrays The splice() Method part 3 JS Arrays The concat() Method part 1 JS Arrays The concat() Method part 2 JS Arrays The concat() Method part 3 JS Arrays The slice() Method part 1 JS Arrays The slice() Method part 2 JS Arrays The slice() Method part 3 JS Arrays The slice() Method part 4 JS Arrays The toString() Method part 1 JS Arrays The toString() Method part 2 JS Arrays The sort() Method part 1 JS Arrays Sort in Reverse JS Arrays The sort() Method part 2 JS Arrays The sort() Method part 3 JS Arrays The sort() Method part 4 JS Arrays The sort() Method part 5 JS Arrays The sort() Method part 6 JS Arrays The sort() Method part 7 JS Arrays The sort() Method part 8 JS Array Sort The Highest Number JS Array Sort The lowest number JS Arrays sort the highest number JS Arrays sort the lowest number JS Arrays sort car objects by age JS Arrays sort car objects by type JS Arrays The forEach() Method part 1 JS Arrays The forEach() Method part 2 JS Arrays The map() Method part 1 JS Arrays The map() Method part 2 JS Arrays The filter() Method part 1 JS Arrays The filter() Method part 2 JS Arrays The reduce() Method part 1 JS Arrays The reduce() Method part 2 JS Arrays The reduce() Method part 3 JS Arrays The reduceRight() Method part 1 JS Arrays The reduceRight() Method part 2