Scala Program: BankAccount class with deposit and withdrawal methods

Scala OOP Exercise-5 with Solution

Write a Scala program that creates a class BankAccount with properties accountNumber and balance. Implement methods to deposit and withdraw money from the account.

Sample Solution:

Scala Code:

class BankAccount(val accountNumber: String, var balance: Double) {
  def deposit(amount: Double): Unit = {
    balance += amount
    println(s"Deposited $amount. New balance: $balance")
  }

  def withdraw(amount: Double): Unit = {
    if (amount <= balance) {
      balance -= amount
      println(s"Withdrew $amount. New balance: $balance")
    } 
    else 
    {
      println(s"Want to withdraw $amount? Insufficient balance!")
    }
  }
}

object BankAccountApp {
  def main(args: Array[String]): Unit = {
    val account = new BankAccount("SB-1234", 1000.0)

    println(s"Account Number: ${account.accountNumber}")
    println(s"Initial Balance: ${account.balance}")

    account.deposit(500.0)
    account.withdraw(200.0)
    account.withdraw(2000.0)
  }
}

Sample Output:

Account Number: SB-1234
Initial Balance: 1000.0
Deposited 500.0. New balance: 1500.0
Withdrew 200.0. New balance: 1300.0
Want to withdraw 2000.0? Insufficient balance!

Explanation:

In the above exercise,

• The "BankAccount" class is defined with a constructor that takes accountNumber as a parameter and initializes the balance property. The accountNumber property is defined as a val to make it read-only, while the balance property is defined as a var to make it mutable.
• The "deposit()" method takes an amount parameter, adds it to the balance, and prints the updated balance.
• The "withdraw()" method takes an amount parameter and checks if the withdrawal amount is less than or equal to the balance. If it is, it subtracts the amount from the balance and prints the updated balance. Otherwise, it prints "Insufficient balance."
• The "BankAccountApp" object contains the "main()" method where you can test functionality. A BankAccount instance is created, the initial account number and balance are printed, and then deposits and withdrawals are performed.

Scala Code Editor :

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