print('123')
print(int('123'))
print(type('123'))
print(type(int('123')))
#
a = '123'
b = '12'
print("Type de a et b : ", type(a), type(b))
print("a + b =... ", a + b)
print("Conversion de a et b en entiers")
a = int(a)
b = int(b)
print("Type de a et b : ", type(a), type(b))
print("a + b =... ", a + b)