#je pose les premiere variables (variables de bases)
number1 = float(input("rentrée le 1er nombre:"))
operation = input("choisissez , +,*,-,/, :")
number2 = float(input("rentrée le 2e nombre: "))

#etablir les premiere conditions
resultat1 = number1+number2
resultat2 =number1*number2
resultat3 =number1-resultat2
resultat4 =number1/resultat2
#les conditions des calcules 
if operation =="+":
    print("le resultat est :",resultat1)

elif operation =="-":
    print(resultat3)

elif operation =="*":
    print(resultat2)

elif operation =="/":
    print("le resultat est:",resultat4)

else:
    #les exceptions 
    print("operation invalide❌")