freecodecamp--freecodecamp/curriculum/challenges/english/blocks/daily-coding-challenges-javascript/691b559495c5cb5a37b9b480.md

id, title, challengeType, dashedName

id	title	challengeType	dashedName
691b559495c5cb5a37b9b480	Challenge 120: Pounds to Kilograms	28	challenge-120

--description--

Given a weight in pounds as a number, return the string "(lbs) pounds equals (kgs) kilograms.".

• Replace "(lbs)" with the input number.
• Replace "(kgs)" with the input converted to kilograms, rounded to two decimals and always include two decimal places in the value.
• 1 pound equals 0.453592 kilograms.
• If the input is 1, use "pound" instead of "pounds".
• If the converted value is 1, use "kilogram" instead of "kilograms".

--hints--

convertToKgs(1) should return "1 pound equals 0.45 kilograms.".

assert.equal(convertToKgs(1), "1 pound equals 0.45 kilograms.");

convertToKgs(0) should return "0 pounds equals 0.00 kilograms.".

assert.equal(convertToKgs(0), "0 pounds equals 0.00 kilograms.");

convertToKgs(100) should return "100 pounds equals 45.36 kilograms.".

assert.equal(convertToKgs(100), "100 pounds equals 45.36 kilograms.");

convertToKgs(2.5) should return "2.5 pounds equals 1.13 kilograms.".

assert.equal(convertToKgs(2.5), "2.5 pounds equals 1.13 kilograms.");

convertToKgs(2.20462) should return "2.20462 pounds equals 1.00 kilogram.".

assert.equal(convertToKgs(2.20462), "2.20462 pounds equals 1.00 kilogram.");

--seed--

--seed-contents--

function convertToKgs(lbs) {
  return lbs;
}

--solutions--

function convertToKgs(lbs) {
  const KG_PER_POUND = 0.453592;
  const kgs = (lbs * KG_PER_POUND).toFixed(2);

  const poundWord = lbs === 1 ? "pound" : "pounds";
  const kilogramWord = kgs === "1.00" ? "kilogram" : "kilograms";

  return `${lbs} ${poundWord} equals ${kgs} ${kilogramWord}.`;
}