1A

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num1=float(input("Enter first number: "))
num2=float(input("Enter second number: "))
print("1.Add")
print("2.Subtract")
print("3.Multiply")
print("4.Divide")
choice=input("Enter your choice(1/2/3/4): ")
if choice=='1':
print("Result:",num1+num2)
elif choice=='2':
print("Result:",num1-num2)
elif choice=='3':
print("Result:",num1*num2)
elif choice==('4'):
if num2!=0:
print("Result:",num1/num2)
else:
print("Error! Divison by zero is not allowed")
else:
print("Invalid choice")