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python
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# # This function adds two numbers def add(x, y): return x + y # This function subtracts two numbers def subtract(x, y): return x - y # This function multiplies two numbers def multiply(x, y): return x * y # This function divides two numbers def divide(x, y): return x / y def main(): while True: print("\nSelect operation.") print("1.Add") print("2.Subtract") print("3.Multiply") print("4.Divide") # Take input from the user choice = input("Enter choice(1/2/3/4):") try: num1 = int(input("Enter first number: ")) num2 = int(input("Enter second number: ")) except ValueError: print('wrong value please enter a correct number and not a zero') else: if choice == '1': print(num1,"+",num2,"=", add(num1,num2)) elif choice == '2': print(num1,"-",num2,"=", subtract(num1,num2)) elif choice == '3': print(num1,"*",num2,"=", multiply(num1,num2)) elif choice == '4': try: print(num1,"/",num2,"=", divide(num1,num2)) except: print('Invalid number you cannot divide by zero') else: print("Invalid input") main()
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