ATM simulation in R

The following code defines an R function called atm() that simulates the basic functionality of an ATM. The function has a simple menu-based user interface that allows the user to check their balance, withdraw cash, deposit cash, or exit the ATM. The function keeps track of the user's account balance and updates it accordingly whenever the user performs a transaction.

To use the ATM simulation, you can call the atm() function. This will start the simulation and print the ATM menu. You can then enter your choice and follow the instructions to perform different transactions. When you are finished, you can choose the "Exit" option to exit the simulation.

Here is an example of how you might call the atm() function:

When you run this code, the atm() function will be called and the simulation will start. You will see the ATM menu and be prompted to enter your choice. You can then enter your choice and follow the instructions to perform transactions. When you are finished, you can choose the "Exit" option to exit the simulation.