Bank program won't run with a loop

How can i get my program to run until it's told to exit? I want it to store the value that the user inputs and stay at that value until the user changes it again

Code:

//Bank program

#include <iostream>
#include <iomanip>
using namespace std;
int main()
{
//Define Intergers

int Selection = 0;
float TransAmount = 0.0;
float Balance = 0.0;

    cout << setw(15) << "ATM" << endl;
    cout << "1: " << "Open Account" << endl;
    cout << "2: " << "Deposit Funds" << endl;
    cout << "3: " << "Withdraw Funds" << endl;
    cout << "4: " << "Check Balance" << endl;
    cout << "5: " << "Exit" << endl;
    cout << "Make your selection: " << endl;
    cin >> Selection;
    cout << endl;

if (Selection == 1) {
    cout << "Enter the amount to open your account with: ";
    cin >> TransAmount;
    cout << "Your new balance is: " << Balance + TransAmount << endl;
    cout << endl;
    }//End if

if (Selection == 2) {
    cout << "Enter the amount you would like to deposit: ";
    cin >> TransAmount;
    cout << "Your new balance is: " << Balance + TransAmount << endl;
    cout << endl;
    }//End if

if (Selection == 3) {
    cout << "Enter amount you would like to withdraw: ";
    cin >> TransAmount;

if (TransAmount > Balance)
    cout << "Insufficient Funds" << endl;

else
    cout << "Your new balance is: " << Balance - TransAmount << endl;
    }//End else

if (Selection == 4) {
    cout << " Your balance is: " <<Balance << endl;
    }//End if


    }//End main function

There is no loop?

Also, you are never updating balance. You are simply printing out a new value, without actually ever changing it.

Not only this but also u huv to use the loop(do-while). To make ur program enable to ask the user to change the entered values of the user or to exit.