freecodecamp--freecodecamp/curriculum/challenges/english/blocks/daily-coding-challenges-javascript/6a2037a68a0bc2aef0006008.md

id, title, challengeType, dashedName

id	title	challengeType	dashedName
6a2037a68a0bc2aef0006008	Challenge 346: Piggy Bank	28	challenge-346

--description--

Given an object representing a piggy bank, return the total value as a string formatted as "$D.CC".

The object may contain any of the following:

Coin	Value
pennies	$0.01
nickels	$0.05
dimes	$0.10
quarters	$0.25

--hints--

piggyBank({ pennies: 3, nickels: 5, dimes: 2, quarters: 6 }) should return "$1.98".

assert.equal(piggyBank({ pennies: 3, nickels: 5, dimes: 2, quarters: 6 }), "$1.98");

piggyBank({ pennies: 1, nickels: 1, dimes: 1, quarters: 1 }) should return "$0.41".

assert.equal(piggyBank({ pennies: 1, nickels: 1, dimes: 1, quarters: 1 }), "$0.41");

piggyBank({ nickels: 8, dimes: 6, quarters: 5 }) should return "$2.25".

assert.equal(piggyBank({ nickels: 8, dimes: 6, quarters: 5 }), "$2.25");

piggyBank({}) should return "$0.00".

assert.equal(piggyBank({}), "$0.00");

piggyBank({ pennies: 146, nickels: 11, dimes: 0, quarters: 19 }) should return "$6.76".

assert.equal(piggyBank({ pennies: 146, nickels: 11, dimes: 0, quarters: 19 }), "$6.76");

--seed--

--seed-contents--

function piggyBank(coins) {

  return coins;
}

--solutions--

function piggyBank(coins) {
  const values = {
    pennies: 0.01,
    nickels: 0.05,
    dimes: 0.10,
    quarters: 0.25,
  };

  const total = Object.entries(coins).reduce((sum, [coin, count]) => {
    return sum + (values[coin] * count);
  }, 0);

  return "$" + total.toFixed(2);
}