s = 0 k = '' for i in range (9,0,-1): k = k + str(i) s = s + int(k) print 'the last added number is ' , k print s vowels = 'aeiough' s = '' x = raw_input('give a string') for i in x: if i in vowels: s = s+i print s excluded_charachters = 'stST' s = '' x=raw_input('give a string') for i in x: if i not in excluded_charachters: s = s+i print s import random l = [] for i in range(0 , 25): l.append(random.randint(0,100)) print l l.sort() print l print 'the 3 smallest numbers are : ', l[0:3] l.reverse() print 'the 3 smallest numbers are : ', l[0:3]