return a chest board array code example

Example: return a chest board array

function chessBoard(rows, columns) {
  let board = [];
  for(let i = 0; i < rows; i++) 
  {
      let col = [];
      for(let j = 0; j < columns; j++)
      {
          if(i % 2 == 0)
          {
              j % 2 == 0 ? col.push("O") : col.push("X");
          } 
          else
          {
              j % 2 == 0 ? col.push("X") : col.push("O");
          }
      }
      board.push(col);
  }
  return board;
}