Ex 4.2

Solutions de cet exercices :

• Solution de Cyril Dewez :

a,b=1,1
while b<21:
  print (a)
  a,b=7*b,b+1

• Solution de Gérard Swinnen

c = 0
while c < 20:
   c = c +1
   print(c, "x 7 =", c*7)

ou

c = 1
while c <= 20:
   print(c, "x 7 =", c*7)
   c = c +1