bank_account.js

function BankAccount() {
    this.balance = 0;
}

const credit = function (account, amount) {
    account.balance += amount
}

const debit = function (account, amount) {
    if (amount > account.balance) {
        throw "Insufficient funds error";
    }
    account.balance -= amount;
}


module.exports = {BankAccount, credit, debit};