Ruby_Exercise11

def fact(n)
  if n == 0
    1
  else
    n * fact(n-1)
  end
end

def pascal_row(n)
  for k in 0..n
    yield(fact(n)/(fact(k)*fact(n-k)))
  end
end

def pascal(no_of_row)
  for k in 0..no_of_row
    pascal_row(k) {|x| print "#{x}"}
  print "\n"
  end
end

print "Number of rows for Pascal's triangle: "
row = gets.to_i
pascal(row)