Output a textual pyramid

create-pyramid.js

/**
 * Create a pyramid
 * @uses pyramid(<Number:Integer>)
 * @var steps: [Number:Int] Number of pyramid steps
 * @returns String
 * 
 * @example:
 *   console.log(pyramid(6));
 * Outputs:          
 *         #
 *        ###
 *       #####
 *      #######
 *     #########
 *    ###########
 **/
 

function pyramid(steps) {
  var a = ' '
  , b='#'
  , c = steps
  , d = c
  , e = ''
  , f = '\n';

  while (c > 0) {

    e += (c < d) ? Array(3).join(b) : b;
    f += Array(c).join(a);
    f += e + '\n';

    c--;
  }

  return f;
}