Codewars

function whatCentury(year)
{
  let g
  let num
  let array = []
  let result

  let number =[]
  let x = array[0] + array[1] +array[2] +array[3]
  let y = array[0] + array[1]
  for(let x = 0; x < year.length; x++){
    g  = parseInt(year[x])
    array.push(g)
  }
  if (x == y){
    number[0] =  year[0]
    number[1] = year[1]
    num = number[0] + number [1]

  }else{

    number[0] =  year[0]
    number[1] = year[1]
    num = year[0] + year[1]
    num = parseInt (num)
    num = num + 1

    number[0] = parseInt(number[0])
    number[1] = parseInt(number[1])
  }


  let letter
  if(num< 21){
    letter = "th"

  }

  if (num > 20){
    if (number[1] == 1){
      letter = "st"
    }
    if (number[1] == 2){
      letter = "nd"
    }
    if(number[1] == 3){
      letter = "rd"
    }
  }

  result = num + letter
  return result

}






/*Возвращает век введенного года. Ввод всегда будет строкой из 4 цифр, поэтому проверка не требуется.

Примеры
"1999" --> "20th"
"2011" --> "21st"
"2154" --> "22nd"
"2259" --> "23rd"
"1124" --> "12th"
"2000" --> "20th"
*/