Javascript create number upto 17 decimal places

Question

I have to create a JavaScript Number containing 17 decimal places. I used the following code :

var integerPart  = "10";
var roundedDigits = "12345678912345678";
var x  = Number(integerPart + '.' +  roundedDigits);

Output: 10.123456789123457

But when I try to output this number object, I get max of 15 decimal places. How can I achieve this?

Answer 1

all numbers in javascript are double. they have a maximum of 16 digits. you need a special datatype like BigDecimal

see this answer

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and IEEE floating point