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Swift

Inherit

Suppose we have a BankAccount class:

class BankAccount {
  var balance = 0.0
  func deposit(amount: Double) {
    balance += amount
  }
  func withdraw(amount: Double) {
    balance -= amount
  }
}

SavingsAccount extends BankAccount class

class SavingsAccount: BankAccount {
  varinterest = 0.0
  func addInterest() {
    let interest = balance \*0.005
    self. deposit(amount: interest)
  }
}

The new SavingsAccount class (subclass) automatically gets all the characteristics of the BankAccount class (superclass). Additionally, the SavingsAccount class defines an .interest property and an .addInterest() method.

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