how to make choices in python?

Question

for example you want to code a calculator of + and multiply

when you open the calculator it must ask you what do you want to calculate + or ×

Answer 1

a=2
b=3
answer=input("enter + or * \n")
if answer == "+":
print(a+b)
elif answer == "*":
print(a*b)
else:
print("invalid")

Answer 2

if, elif and else statements