print "Masukkan tinggi : "
x=gets.to_i
puts ""
temp=x
i=1
while i<=x
  k=1
  while temp >= 1
    print " "
    temp -=1
  end
  while k<=i
    print "* "
    k+=1
  end
  temp=x-i
  i+=1
  puts ""
end

//Sumber : http://blograhmatfadli.blogspot.co.id/2011/05/membuat-segitiga-pada-ruby.html