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Update round-number-to-n-digits.md

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Angelos Chalaris
2017-12-14 23:15:34 +02:00
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### Round number to n digits ### Round number to n digits
Correctly rounds a number to the specified number of digits. Use `Math.round()` and template literals to round the number to the specified number of digits.
Omit the second argument, `decimals` to round to an integer.
```js ```js
const round = (n, decimals = 0) => const round = (n, decimals=0) => Number(`${Math.round(`${n}e${decimals}`)}e-${decimals}`);
Number(`${Math.round(`${n}e${decimals}`)}e-${decimals}`)
// round(1.005, 2) -> 1.01 // round(1.005, 2) -> 1.01
``` ```