Code example with for and while

user.while_for.service.js

/*
 * Find first manager
 */
function findFirstManager(employees) {
  let manager = {};
  for (let i = 0; i < employees.length; i++) {
    if (employees[i].role === "Manager") {
      manager = employees[i];
      // Break the loop after first manager is found, unnecessary execution is reduced
      break;
    }
  }

  // It will return first manager found in array
  return manager;
}

/*
 * Count HRs
 */
function countHRs(employees) {
  let HRCount = 0;
  let i = 0;
  // Loop over employees till its length
  while (i < employees.length) {
    if (employees[i].role === "HR") HRCount++;
    i++;
  }

  // Return count
  return HRCount;
}