Big integer is not being rounded

Question

Using the following library: http://jsfromhell.com/classes/bignumber

my big integer is not being rounded.

My code is the following:

x=1234.56;
y = new BigNumber(x);
document.write("<br>1 "+Math.round(x)  +"<br>");
document.write("<br>2 "+y.round()+"<br>"); // '1235'
document.write("<br>3 "+y.round(1)+"<br>"); // '1235.6'
document.write("<br>4 "+y.round(2)+"<br>"); // '1235.56'
document.write("<br>5 "+y.round(10)+"<br>"); // '1235.56'
document.write("<br>6 "+y.round(0, 1)+"<br>"); // '1234'
document.write("<br>7 "+y.round(0, 6)+"<br>"); // '1235'
document.write("<br>8 "+y.round(1, 1)+"<br>"); // '1234.5'
document.write("<br>9 "+y.round(1, BigNumber.ROUND_HALF_EVEN)+"<br>"); // '1234.6'

I am receiving the following output:

1 1235

2 1234.56

3 1234.56

4 1234.56

5 1234.56

6 1234.56

7 1234.56

8 1234.56

9 1234.56

@JonathanM There is a `.round()` method [here](http://mikemcl.github.io/bignumber.js/#round) — Eli Sadoff, Jul 05 '16 at 18:34
@JonathanM you're only looking at class methods, not instance methods. — Eli Sadoff, Jul 05 '16 at 18:34
this first link shows this though `BigNumber.round(void)` at the bottom of the page — Xander Luciano, Jul 05 '16 at 18:35
beacause i want to round a big number that math.round doent support it. an I agree with Eli Sadoff, .round() method exist — JORd, Jul 05 '16 at 18:36
Please update your question to should what your expected output is. — Heretic Monkey, Jul 05 '16 at 18:36
I'd say the expected output could be assumed, for `.round(1)` it's `1234.6`, for `.round(2)` it's, `1234.56`, etc. — Eli Sadoff, Jul 05 '16 at 18:38

score 0 · Answer 1 · answered Jul 05 '16 at 18:36

0

The library you're using ask for precision and round type when you create your BigNumber, the round() method didn't take any parameter.

So you should change your code where:

y = new BigNumber(x);

To

y = new BigNumber(x, 0, 1);

answered Jul 05 '16 at 18:36

Mario Santini

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The `.round()` method takes parameters. Look [here](http://mikemcl.github.io/bignumber.js/#round) – Eli Sadoff Jul 05 '16 at 18:37
1

Not the code of the link he posted, where the doc in the page have: `BigNumber.round(void): void` – Mario Santini Jul 05 '16 at 18:49

Big integer is not being rounded

1 Answers1