/**
 * Checks if a password is valid. A password is considered valid if it has a length 
 * of 10 or more characters, includes at least one capital letter, and contains 
 * at least one non-alphanumeric character.
 *
 * @param {string} password - The password to be checked.
 * @returns {boolean} - Returns true if the password is valid, otherwise returns false.
 */
function passwordChecker(password) {
  const minLength = 10;
  const capitalLetter = /[A-Z]/;
  const nonAlphanumeric = /[^a-zA-Z0-9]/;

  if (password.length >= minLength &&
      capitalLetter.test(password) &&
      nonAlphanumeric.test(password)) {
    return true;
  } else {
    return false;
  }
}