August 2006
Intermediate to advanced
1018 pages
34h 13m
English
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Name
Number.toExponential( ): format a number using exponential notation — ECMAScript v3
Synopsis
number.toExponential(digits)
Arguments
-
digits The number of digits that appears after the decimal point. This may be a value between 0 and 20, inclusive, and implementations may optionally support a larger range of values. If this argument is omitted, as many digits as necessary are used.
Returns
A string representation of
number, in exponential
notation, with one digit before the decimal place and
digits digits after the decimal place.
The fractional part of the number is rounded, or padded with
zeros, as necessary, so that it has the specified length.
Throws
- RangeError
If
digitsis too small or too large. Values between 0 and 20, inclusive, will not cause a RangeError. Implementations are allowed to support larger and smaller values as well.- TypeError
If this method is invoked on an object that is not a Number.
Example
var n = 12345.6789; n.toExponential(1); // Returns 1.2e+4 n.toExponential(5); // Returns 1.23457e+4 n.toExponential(10); // Returns 1.2345678900e+4 n.toExponential( ); // Returns 1.23456789e+4
See Also
Number.toFixed( ), Number.toLocaleString( ), Number.toPrecision( ), Number.toString( )
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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.