I am having difficulty understanding the Encapsulation lesson, is there anyone who can explain the solution to me step by step

Question

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace SoloLearn
{
class BankAccount {
private double balance=0;
public void Deposit(double n) {
balance += n;
}
public void Withdraw(double n) {
balance -= n;
}
public double GetBalance() {
return balance;
}
}
class Program
{
static void Main(string[] args)
{
BankAccount b = new BankAccount();
b.Deposit(199);
b.Withdraw(42);
Console.WriteLine(b.GetBalance());
}
}
}

Answer 1

By simple terms:-
1) We will have the class variables declared as private.

2) To access those variables (modify/get value) outside that class, we will have getters and setters methods.

In your example withdraw() & deposit() acts as setters and getBalance() acts as getter.

The reason behind this kind of approach is to prevent accessing the value of the variable directly like BankAccount.balance = 100.

Think of this situation,
you should only be able to modify your bank balance only when you either deposit and withdraw and should prevent modifying balance like BankAccount.balance = 100.

To achieve this encapsulation is used.

Answer 2

Niththish
I don't understand what this example has to do with encapsulation? This example is a class with attributes and functions and I don't know what difference Public and Private will make