Creating a JS checker board grid

checkerBoard.js

//size is the dimension of the square grid
var size = 8,
    white = " ",
    black = "#",
    rowE = "",
    rowO = "",
    grid = "";
//even grid row
for ( var x = 0 ; x < size; x++){
  if (x % 2 === 0){
  	rowE = rowE + black;
  }else{
    rowE = rowE + white;
  };
}
//odd grid row
for ( var i = 0 ; i < size; i++){
  if (i % 2 === 0){
  	rowO = rowO + white;
  }else{
    rowO = rowO + black;
  };
}
//combining row with '\n'
for ( var j = 0 ; j < size; j++){
  if (j % 2 === 0){
  	grid = grid + rowO + "\n";
  }else{
    grid = grid + rowE + "\n";
  };  
}
console.log(grid);