if function_type == 'add' or 'subtract' or 'multiply' or 'divide':
    print("Correct Operation!")
else:
    print("Incorrect Operation")
    quit()

num_1 = float(input("First Number: "))
num_2 = float(input("Second Number: "))

if function_type == "add":
    print(num_1 + num_2)

if function_type == "subtract":
    print(num_1 - num_2)

if function_type == "multiply":
    print(num_1 * num_2)

if function_type == "divide":
    print(num_1 / num_2)