Untitled

# # 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()