class calculator:
print("choose option : ")
print("1. Addition")
print("2. Subtract")
print("3. Division")
n = int(input("select option: "))
if(n==1):
print("Addition is selected")
num1 = int(input("Enter the number:"))
num2 = int(input("Enter the number:"))
obj = Addition(num1, num2)
if(n==2):
print("Subtraction is selected")
if(n==3):
print("Division is selected")
