chess-board.js

var log = console.log;
var number = 8;
var line = " ";
var counter = 0, counter2 = 0;
while (counter < number-1) {
    counter++;
    line = counter % 2 ? " " : "#";
    counter2 = 0;
    while (counter2 < number-1) {
        var letter = (line[counter2] == " ") ? "#" : " ";
        line += letter;
        counter2++;
    }
    log(line);
}