JavaScript - Keep trailing zeroes [duplicate]

问题:

This question already has an answer here:

• How to add a trailing zero to a price with jQuery 3 answers

I want to parse a string and I used parseFloat(), but it removes all the trailing zeroes. How to prevent this - I need to parse the string exactly - if I have 2.5000, I need exactly the same result as a floating-point number - 2.5000.

回答1:

You can do

parseFloat(2.5).toFixed(4);

If you need exactly the same floating point you may have to figure out the amount

var string = '2.54355';
parseFloat(string).toFixed(string.split('.')[1].length);

But i don't really understand why you even need to use parseFloat then? Numbers in javascript do not retain the floating-point count. so you would have to keep them as strings, and calculate against them as floats.