Classes & Access Modifiers

class BankAccount { readonly id: string; private balance: number = 0;

constructor(id: string, public owner: string) { // parameter property this.id = id; }

deposit(amount: number): void { if (amount <= 0) throw new RangeError("Deposit must be positive"); this.balance += amount; }

get currentBalance(): number { return this.balance; } }

Parameter properties (public owner) declare and assign a property in one step.