main.dart

void main() {
  var customerAccount = Bank('Dosu Roseline', 101110101, 500000);
  
  print(customerAccount.availableBalance());
  print( customerAccount.deposit(0));
  print(customerAccount.withdrawal(5000000));
  
}


class Bank{
  String? accountName;
  int? accountNumber;
  int accountBalance = 0;
  
  Bank(this.accountName, this.accountNumber, this.accountBalance);
  
  availableBalance() {
    return 'Available blance is $accountBalance';
  }
  
  deposit(int amount) {
    print('Money deposited successfully');
    return accountBalance += amount;
  }
  
  withdrawal(int amount) {
    if(amount > accountBalance) {
      print('Insufficient Funds!');
    }
  return accountBalance -= amount;   
  }
}