Number Methods - JavaScript Tutorial - w3Schools - Chapter 21 - English
These number methods can be used on all JavaScript numbers:
Method Description
toString() Returns a number as a string
toExponetial() Returns a number written in exponential notation
toFixed() Returns a number written with a number of decimals
toPrecision() Returns a number written with a specified length
ValueOf() Returns a number as a number
Number() Returns a number converted from its argument.
parseFloat() Parses its argument and returns a floating point number
parseInt() Parses its argument and returns a whole number
Number Object Methods
These object methods belong to the Number object:
Method Description
Number.isInteger() Returns true if the argument is an integer
Number.isSafeInteger() Returns true if the argument is a safe integer
Number.parseFloat() Converts a string to a number
Number.parseInt() Converts a string to a whole number
Number Methods Cannot be Used on Variables
The number methods above belong to the JavaScript Number Object.
These methods can only be accessed like Number.isInteger().
Using X.isInteger() where X is a variable, will result in an error:
TypeError X.isInteger is not a function.
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