function average(numbers: number[]): number {

  if ( !(numbers.length > 0) ) return 0

  let add = 0

  for ( let i : number = 0; i < numbers.length; i++ ) {
    add += numbers[i]
  }

  let avg = add / numbers.length

  return avg;
}

// No modificar: necesario para evaluar el resultado.
export { average };