Sum with javascript returning wrong value

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I have some fields on my page and they have values, I take these values and we are, it turns out that the value goes wrong, as I take them from the DOM and end up coming as string, I convert into number, so instead of posting all the code here, comes out something like this:

var valor = parseInt("3.50");
console.log(valor + valor);

The value I expected was 7.00, but it returns me 6, IE, the sum seems to be wrong. Note: I am still learning

javascript
  • 2

    It’s not adding up wrong, you’re converting wrong. use parseFloat instead of parseint

  • parse int will return you only the integer value, without the decimal.

  • See the documentation

  • Wow, it worked, but it returns only the value like this: 7, there is a way to return equal to real?

  • 1

    parseInt, as the name says, transforms the value into INT, that is, an integer value. If it has a decimal value, it must convert to float, with the parseFloat.

  • @Otaviofagundes use the search field of the site, there are already related questions.

  • 1

    @Otaviofagundes would be like this: valor.toLocaleString("pt-BR", { style: "currency" , currency:"BRL"}); remembering that valor has to be converted first.

  • Gave it right and still brought me the "R$" automatically, I did not know that javascript had this kind of thing

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var valor = parseFloat("3.50");
console.log(valor + valor);

You are turning the string into Integer it will round down pattern, in case you can round up using Math.round() or how you are using Real number to use parseFloat()

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