text: 'use strict';
  
  const sum = (...args) => {
    if (args.length === 0) return 0;
    let acc = 0;
    let i = 0;
    do {
      acc += args[i];
      i++;
    } while (i < args.length);
    return acc;
  };
  
  module.exports = { sum };
  