Convert to Double(cDbl) in JavaScript

[rishabhshrivastava]

Hello All,
How can I convert a value to Double in JavaScript??? In vbscript i
believe its done as

cDbl(Value)

I tried lots of way but getting a value of "NaN".

Any suggestions/ideas will be truely appreciated.

Thanks.

[Lasse Reichstein Nielsen]

ri************* ***@gmail.com writes:

How can I convert a value to Double in JavaScript???

Convert it to a number. All numbers in JavaScript are doubles.

If the value you convert from is a string representation, you
can use either Number(value) or parseFloat(valu e). The first
requires the value to be a syntactically correct number, whereas
the latter allows trailing garbage.

I tried lots of way but getting a value of "NaN".

Well, success. NaN is a value of the number type (contrary
to its name :). It probably means that the value does not
have the correct format.

/L
--
Lasse Reichstein Nielsen - lr*@hotpop.com
DHTML Death Colors: <URL:http://www.infimum.dk/HTML/rasterTriangleD OM.html>
'Faith without judgement merely degrades the spirit divine.'

[Richard Cornford]

ri************* ***@gmail.com wrote:

Hello All,
How can I convert a value to Double in JavaScript??? In
vbscript i believe its done as

Javascript's only numeric type is an IEEE double precision floating
point number, so if you convert any value into a number that number will
be a double.

The shortest conversion of a value into a number is with the unary plus
operator

var numericVal = (+otherValue);

The most self-documenting is to pass the value as an argument to the
Number object constructor called as a function:-

var numericVal = Number(otherVal ue);

cDbl(Value)

I tried lots of way but getting a value of "NaN".

That is a different issue, it implies that the value you are trying to
convert is Not a Number (NaN) when type converted into a number. That
may be that it is a string that is not in the correct form to be
converted into a number, or it is an object of some sort that does no
have a - valueOf - method that returns a number primitive or a value
that will type-convert into a number.

Without seeing the input value, and what you are doing with it, it will
not be possible to say.

Richard.

[Dr John Stockton]

JRS: In article <11************ **********@i42g 2000cwa.googleg roups.com>
, dated Mon, 21 Aug 2006 15:32:56 remote, seen in
news:comp.lang. javascript, ri************* ***@gmail.com posted :

>How can I convert a value to Double in JavaScript??? In vbscript i
believe its done as

cDbl(Value)

I tried lots of way but getting a value of "NaN".

Any suggestions/ideas will be truely appreciated.

Before posting here you should have read the newsgroup and its FAQ,
frequently cited. All of it, but especially sections 2 & 4.21.

All numbers (except when stored as strings) are stored as IEEE Doubles.

To convert a numeric string to a number use unary +, parseInt,
parseFloat, or a purely arithmetic context.

--
© John Stockton, Surrey, UK. ?@merlyn.demon. co.uk Turnpike v4.00 IE 4 ©
<URL:http://www.jibbering.c om/faq/>? JL/RC: FAQ of news:comp.lang. javascript
<URL:http://www.merlyn.demo n.co.uk/js-index.htmjscr maths, dates, sources.
<URL:http://www.merlyn.demo n.co.uk/TP/BP/Delphi/jscr/&c, FAQ items, links.