Arrays can be initialized in a variety of ways:
a1 = [] # empty array a2 = Array.new # same thing a3 = [10, 20, 30] a4 = ['apple', 'cherry', 'pecan'] a5 = %w(apple cherry pecan) # same as a4 a6 = [nil, nil, nil] a7 = Array.new(3) # same as a6 a8 = [0, 0, 0] a9 = Array.new(3, 0) # same as a8