aws lambda function for rounding numbers

roundnumber2.js

const roundNumber = (number, decimlPlaces) => {
  return Number((Math.round(number + `e${decimlPlaces}`)) + `e-${decimlPlaces}`);
}

exports.handler = async (event) => {
  const { number, places } = JSON.parse(event.body);
  if (isNaN(number) || isNaN(places)) {
    throw new Error('Invalid input supplied');
  }
  const answer = roundNumber(number, places);
  
  const response = {
    statusCode: 200,
    body: answer,
  };
  return response;
};