JavaScript Chess Board

chess-ascii.js

/*
http://eloquentjavascript.net/02_program_structure.html

Write a program that creates a string that represents an 8×8 grid, using newline characters to separate lines. At each position of the grid there is either a space or a “#” character. The characters should form a chess board.

Passing this string to console.log should show something like this:

# # # #
 # # # #
# # # #
 # # # #
# # # #
 # # # #
# # # #
 # # # #
When you have a program that generates this pattern, define a variable size = 8 and change the program so that it works for any size, outputting a grid of the given width and height.
*/

var size = 8, string = "";

for (var line = 0; line < size; line++) {
  for(var i = 0; i < size; i++) {
    string += ((i+line) % 2) === 0 ? "#" : " ";
  }
  string += "\n";
}

console.log(string);