August 2006
Intermediate to advanced
1018 pages
34h 13m
English
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Name
Number: support for numbers — ECMAScript v1: Object → Number
Constructor
new Number(value) Number(value)
Arguments
-
value The numeric value of the Number object being created or a value to be converted to a number.
Returns
When Number( ) is used
with the new operator as a
constructor, it returns a newly constructed Number object. When
Number( ) is invoked as a
function without the new
operator, it converts its argument to a primitive numeric value
and returns that value (or NaN
if the conversion failed).
Constants
-
Number.MAX_VALUE The largest representable number.
-
Number.MIN_VALUE The smallest representable number.
-
Number.NaN Not-a-number value.
-
Number.NEGATIVE_INFINITY Negative infinite value; returned on overflow.
-
Number.POSITIVE_INFINITY Infinite value; returned on overflow.
Methods
-
toString( ) Converts a number to a string using a specified radix (base).
-
toLocaleString( ) Converts a number to a string using local number-formatting conventions.
-
toFixed( ) Converts a number to a string that contains a specified number of digits after the decimal place.
-
toExponential( ) Converts a number to a string using exponential notation with the specified number of digits after the decimal place.
-
toPrecision( ) 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.
-
valueOf( ) Returns the primitive numeric value of a Number object.
Description
Numbers ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.