ageDeEricPraline      = 50
ageDeHenryWensleydale   = 20

# Test
if 0 > ageDeEricPraline > 150 or ageDeEricPraline > ageDeHenryWensleydale:
    print("l'age de Eric Praline est incorrect")

#echange : swap
ageDeHenryWensleydale, ageDeEricPraline = ageDeEricPraline,ageDeHenryWensleydale
print("age de Henry Wensleydale = %d , age de Eric Praline = %d" %(ageDeHenryWensleydale,ageDeEricPraline))