Round function and add "$"

Question

I have searched and tried several times but still can't get it. How do I prepend "$" and round the value to the nearest 100th of a decimal. Example: $100.00

<script>
  $.get("https://api.coinmarketcap.com/v1/ticker/", function(data, status) {
    for (var i = 0; i < data.length - 1; i++) {
      if (data[i].id == "unit") {
        $("#unit").html(parseFloat(data[i].price_usd) * 500000);
      }
    }
  });
</script>

String concatentation and some grouping parentheses and the `.toFixed(2)` method are all you need. — nnnnnn, Jul 18 '17 at 04:09
Possible duplicate of [How can I format numbers as dollars currency string in JavaScript?](https://stackoverflow.com/questions/149055/how-can-i-format-numbers-as-dollars-currency-string-in-javascript) — Capsule, Jul 18 '17 at 04:09
Really? That's the first result when you google "format currency JS" — Capsule, Jul 18 '17 at 04:10
actually in data the string "unit" is not there. please check once — raj peer, Jul 18 '17 at 04:25

score 2 · Answer 1 · answered Jul 18 '17 at 04:11

2

Use Number.prototype.toFixed() to make fixed number of decimals, concatinate strings as usual, because toFixed returns string:

function toCurrency(value = 0, symbol = '$', onEnd = false) {
  if (onEnd) {
    return Number(value).toFixed(2) + symbol;
  }
  return symbol + Number(value).toFixed(2);
}

console.log(toCurrency(123.7483));
console.log(toCurrency(123));
console.log(toCurrency(123, ' USD', true));

answered Jul 18 '17 at 04:11

zb'

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To make your code a little DRYer, might I suggest the following edit? `const cost = Number(value).toFixed(2); return onEnd ? cost + symbol : symbol + cost;` – Patrick Roberts Jul 18 '17 at 04:28
i don't think it is necessary on any way. – zb' Jul 18 '17 at 09:31

Round function and add "$"

1 Answers1