#Example program
print "Example program: ASCII triangle"
input lns, "Number of lines: "
lns = num: lns
for i = 0 to lns do
  s = ""
  for j = 0 to lns - i do
    s += " "
  end
  for j = 0 to i * 2 + 1 do
    s += "*"
  end
  print s
end