In Javascript (trying in Firefox 4)
"" + 8.1
gives "8.1" (a string). But
"" + 8.0
gives "8" (also a string), but is there a way to make it give "8.0" instead like it did for 8.1?
In Javascript, "" + 8.1 works fine, giving "8.1", but "" + 8.0 gives "8". How to make it give "8.0"?
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nonopolarity
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Do you want to display a certain number of decimal places? Is `"8.0"` not an option? – Explosion Pills Apr 15 '11 at 13:07
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??? I do want `"8.0"` That's what I wanted in the first place – nonopolarity Apr 15 '11 at 13:08
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Sorry, I meant using the string `"8.0"` not `8.0`. – Explosion Pills Apr 15 '11 at 14:48
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See the answer to [this question](http://stackoverflow.com/questions/610406/javascript-printf-string-format) it might help you out alot. – Naftali Apr 15 '11 at 13:08
4 Answers
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1since .toFixed() returns a string anyway, you don't even need to add it to the empty string. – Spudley Apr 15 '11 at 13:09
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If you need more digits of precision but still want to strip trailing zeros, you could do something like `(8.5).toFixed(5).replace(/(.\d+?)0*$/, "$1")` – gnarf Apr 15 '11 at 13:14
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You need a proper printf style extension for Javascript if you want to show numbers with a particular precision - you can't do it with plain type coercion.
Search for "javascript printf" here and on Google - there's plenty of suitable references.
Alnitak
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Javascript has internal type convertion (called loose typing) so that it converts 8.0 to 8 by default. Javascript has no separate datatypes for float numbers and integers like other languages. It has just the type Number. You can print numbers using printf (e.g. from a jquery plugin or you can convert the Number to a string with fixed width: (8).toFixed(1) which creates a string, so you don't have to use "" + ...
Florian
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