How to truncate (not round) a particular number after decimal point using javascript

Question

input : -81.82637799999999(14 numbers after decimal point)

output :-81.8263779999999(13 numbers after decimal point)

How can I implement this using javascript?

convert to string split the string 13 places after decimal point, then parse to int — thatOneGuy, Feb 02 '16 at 11:00
Possible duplicate of [Truncate (not round off) decimal numbers in javascript](http://stackoverflow.com/questions/4912788/truncate-not-round-off-decimal-numbers-in-javascript) — Electric Sheep, Feb 02 '16 at 11:05
@thisOneGuy parsint to int is not going to keep the truncated decimal part — Jon Surrell, Feb 02 '16 at 11:15

score 0 · Accepted Answer · answered Feb 02 '16 at 11:19

Well try this. See if it works for you

var x = -81.82637799999999;
x = x.toString(); // convert to string
alert(x.length);
x = x.substring(0, x.length - 1); // cut out last character
alert(x.length);
x = parseFloat(x); // convert it back to float

https://jsfiddle.net/9sngtp3n/1/

How to truncate (not round) a particular number after decimal point using javascript

1 Answers1