November 2001
Intermediate to advanced
936 pages
68h 43m
English
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Name
Number — support for numbers
Availability
JavaScript 1.1; JScript 2.0; ECMAScript v1
Inherits from/Overrides
Inherits from Object
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.
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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.