How to format decimals in Javascript?

Question

Guys, with the following code here, I wanted to know how to round the decimal places of the floating values: from now on I thank those who can help :)

           num1 = parseFloat (prompt ("digite o primeiro número para o calculo da média: "));
           num2 = parseFloat (prompt ("digite o segundo número para o calculo da média: "));
           num3 = parseFloat (prompt ("digite o terceiro número para o calculo da média: "));
           var media = (num1 + num2 + num3)/3;
           document.write("<p>média dos valores inseridos: " + (media) + "</p>");
   </script>

Answer 1

Use the Math.floor() function if you want to round it down or Math.Ceil() to round it up.

If you want to round the number of decimals use . toFixed(X), where X is the number of rounded boxes.

num1 = parseFloat (prompt ("digite o primeiro número para o calculo da média: "));
num2 = parseFloat (prompt ("digite o segundo número para o calculo da média: "));
num3 = parseFloat (prompt ("digite o terceiro número para o calculo da média: "));
var media = (num1 + num2 + num3)/3;
var mediaArred = Math.floor(media);
document.write("<p>média dos valores inseridos: " + (mediaArred + "</p>");

Answer 2

Friend, take a look at this function, it will solve your problem...

Math.round(x);

access the link below, is the source of my answer, will help you!

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

Answer 3

Just do

document.write("<p>média dos valores inseridos: " + (media.toFixed(n)) + "</p>");

where n is the number of decimal places desired. Follow a help link: https://www.w3schools.com/JSREF/jsref_tofixed.asp