module.exports = function bcadd(leftOperand, rightOperand, scale) {
  //  discuss at: https://locutus.io/php/bcadd/
  // original by: lmeyrick (https://sourceforge.net/projects/bcmath-js/)
  //   example 1: bcadd('1', '2')
  //   returns 1: '3'
  //   example 2: bcadd('-1', '5', 4)
  //   returns 2: '4.0000'
  //   example 3: bcadd('1928372132132819737213', '8728932001983192837219398127471', 2)
  //   returns 3: '8728932003911564969352217864684.00'

  const bc = require('../_helpers/_bc')
  const libbcmath = bc()

  let first, second, result

  if (typeof scale === 'undefined') {
    scale = libbcmath.scale
  }
  scale = scale < 0 ? 0 : scale

  // create objects
  first = libbcmath.bc_init_num()
  second = libbcmath.bc_init_num()
  result = libbcmath.bc_init_num()

  first = libbcmath.php_str2num(leftOperand.toString())
  second = libbcmath.php_str2num(rightOperand.toString())

  result = libbcmath.bc_add(first, second, scale)

  if (result.n_scale > scale) {
    result.n_scale = scale
  }

  return result.toString()
}