--description--

Given an array of integers representing the coins in your pocket, with each integer being the value of a coin in cents, return the total amount in the format "$D.CC".

• 100 cents equals 1 dollar.
• In the return value, include a leading zero for amounts less than one dollar and always exactly two digits for the cents.

--hints--

countChange([25, 10, 5, 1]) should return "$0.41".

assert.equal(countChange([25, 10, 5, 1]), "$0.41");

countChange([25, 10, 5, 1, 25, 10, 25, 1, 1, 10, 5, 25]) should return "$1.43".

assert.equal(countChange([25, 10, 5, 1, 25, 10, 25, 1, 1, 10, 5, 25]), "$1.43");

countChange([100, 25, 100, 1000, 5, 500, 2000, 25]) should return "$37.55".

assert.equal(countChange([100, 25, 100, 1000, 5, 500, 2000, 25]), "$37.55");

countChange([10, 5, 1, 10, 1, 25, 1, 1, 5, 1, 10]) should return "$0.70".

assert.equal(countChange([10, 5, 1, 10, 1, 25, 1, 1, 5, 1, 10]), "$0.70");

countChange([1]) should return "$0.01".

assert.equal(countChange([1]), "$0.01");

countChange([25, 25, 25, 25]) should return "$1.00".

assert.equal(countChange([25, 25, 25, 25]), "$1.00");

--seed--

--seed-contents--

function countChange(change) {

  return change;
}

--solutions--

function countChange(change) {
  const totalCents = change.reduce((sum, coin) => sum + coin, 0);

  const dollars = Math.floor(totalCents / 100);
  const cents = totalCents % 100;

  return `$${dollars}.${cents.toString().padStart(2, "0")}`;
}