Print a staircase

Example Output:

          #

        ##

      ###

    ####

  #####

######

def staircase(n):

    for j in range(n-1,-1,-1):

        s =

        for i in xrange(n):

            if i >= j:

                s = s + ‘#’

            else:

                s = s + ‘ ‘

        print s

staircase(6)

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