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A thought struck me as I was writing a piece of JavaScript code that processed some floating point values. What is the decimal point symbol in JavaScript? Is it always . ? Or is it culture-specific? And what about .toFixed() and .parseFloat() ? If I'm processing a user input, it's likely to include the local culture-specific decimal separator symbol. Ultimately I'd like to write code that supports both decimal points in user input - culture-specific and . , but I can't write such a code if I don't know what JavaScript expects. Added: OK, Rubens Farias suggests to look at similar question which has a neat accepted answer: function whatDecimalSeparator() { var n = 1.1; n = n.toLocaleString().substring(1, 2); return n; } That's nice, it lets me get the locale decimal point. A step towards the solution, no doubt. Now, the remaining part would be to determine what the behavior of .parseFloat() is. Several answers point out that for floating point literals only . is valid. Does .parseFloat() act the same way? Or might it require the local decimal separator in some browser? Are there any different methods for parsing floating point numbers as well? Should I roll out my own just-to-be-sure?

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