function chessBoard(size: number) {
  let output = "";
  let sizeV = size;

  for (let h = 1; h <= size; h++) {
    const isEven = h % 2 === 0;

    for (let v = 1; v <= sizeV; v++) {

      if (isEven) {
        output += v % 2 !== 0 ? "#" : " ";
      } else {
        output += v % 2 === 0 ? "#" : " ";
      }

      if (v === sizeV) output += "\n"
    }

  }

  console.log(output)
}

chessBoard(8);