I'm working on a basic banking app for a beginning JS class.

Expected:

• user clicks button that calls banking app function with a switch statement to choose to withdraw, deposit, check balance or quit
• after choosing withdraw or deposit, they're prompted to add the amount
• log in the console the amount of deposit/withdrawal and the the new balance
• every subsequent button click and withdrawal/deposit should keep track of the balance

Actual:

• The subtotal is resetting because of the switch statement, I can't figure out how to keep the running total without deleting the break.

Is there a way to adjust this code to keep a running balance?

function bankingApp() {
  let currentBalance = 0;
  let userPrompt = prompt(
    "bank menu: w = withdrawal | d = deposit | b = balance |  q = quit"
  );

  switch (userPrompt) {
    case "w":
      function withdrawFunds() {
        let withdrawAmount = parseFloat(prompt("Withdraw amount: "));
        currentBalance = currentBalance - withdrawAmount;
        console.log(
          "Withdraw: " + withdrawAmount + "New balance: " + currentBalance
        );
      }
      withdrawFunds();
      break;

    case "d":
      function depositFunds() {
        let depositAmount = parseFloat(prompt("Deposit amount:"));
        console.log(
          "Deposit: " + depositAmount + "New balance: " + currentBalance
        );
      }
      depositFunds();
      break;

    case "b":
      function checkBalance() {
        let balance = currentBalance;
        console.log(balance);
      }
      checkBalance();
      break;

    case "q":
      function quitProgram() {
        let quit = "Quit the program.";
        console.log(quit);
      }
      quitProgram();
      break;

    default:
      console.log("That menu is not available.");
  }
}