问题
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.
来源：https://stackoverflow.com/questions/24889498/javascript-keep-trailing-zeroes