Calculator in Python

 print("...Welcome to My Calculator...")

while(True):

    print("What you have to do (+ , - , * , / )")

    a = str(input())

    print("Enter two no. : ", end=" ")

    i = int(input())

    o = int(input())

    if (a =="+"):

        print(i+o)

    elif (a =="*"):

        print(i*o)

    elif (a =="-"):

        print(i-o)        

    elif (a =="/"):

        print(i/o)