Decimal places in Javascript

Question

I’m new to programming, I ran a division account and I wanted to reduce the decimals.

Follow my code below!

document.write("A média de gerações que se passaram é: " + (2019/28));

Obs: Result 72.10714285714286.

I wanted to reduce that number to two houses only, as I do?

Thanks in advance!

Answer 1

You can use the .toFixed() to limit the decimal places:

const nr = 72.10714285714286;

console.log(nr.toFixed(2)); // dá 72.11
console.log(nr.toFixed(4)); // dá 72.1071

If you want to use in number format (and not String as the .toFixed returns) can convert back to Number with Number... that is to say:

const nr = 72.10714285714286;

console.log(typeof nr); // number
console.log(nr.toFixed(2)); // dá 72.11
console.log(nr.toFixed(4)); // dá 72.1071

console.log(typeof nr.toFixed(2)); // string

const arredondado = Number(nr.toFixed(2));
console.log(typeof arredondado, arredondado); // number 72.11

Answer 2

Multiply by 100, use the function Math.round() and divided by 100.

document.write("A média de gerações que se passaram é: " + Math.round(2019/28*100)/100);

Reference: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/round