Create a program that simulates a simple banking operation. The program will prompt the user to enter an initial balance, then enter an amount to deposit and an amount to withdraw. The program will then calculate the final balance and display it$.$

Sample Output

Enter the initial balance: $340$

Enter the deposit amount: $34\mathrm{.}23$

Enter the withdrawal amount: $42\mathrm{.}53$

The final balance is: $331\mathrm{.}7$