arrayCart =[];
totalBill = parseInt(0);
cartContent = arrayCart.length;

for(;;)
    {
        userInput = parseInt(prompt('1. Menun2. Your Cartn3. Paymentn4. Exit'))
        switch(userInput)
        {
            // This is to go to Menu
            case 1:
                inputPesanan = prompt('Silahkan pilih menu yang diinginkan:n1. Paket Bento An2. Paket Bento Bn3. Paket Bento C')


// I think the 1st problem starts here
                switch(inputPesanan)
                {
                case 1:
                arrayCart.push('Paket Bento A - Rp20.000n');
                totalBill += parseInt(20000);
                break;

                case 2:
                arrayCart.push('Paket Bento B - Rp25.000n');
                totalBill += parseInt(25000);
                break;

                case 3:
                arrayCart.push('Paket Bento C - Rp30.000n');
                totalBill += parseInt(30000);
                break;
            }
            break;
            // and the 1st problem ends here

        // This is to check the Cart's content
        case 2:
            // And I think the 2nd problem starts here
            inputKeranjang = alert('Isi Keranjang Andan' + arrayCart + 'nn' + 'Total Tagihan Anda: n' + totalBIll)
            break;
            // and it ends here

// This is to input how much money you would like to pay with and calculate the change or deficit (if any)
        case 3:
            inputPayment = parseInt(prompt('Total Tagihan Anda :nRp' + totalBill + 'nnBerapa uang yang Anda akan bayarkan?'));
            switch(true)
            {
                case inputPayment<totalBill:
                alert('Uang Anda kurang sebesar Rp ' + parseInt(totalBill-inputPayment));
                break;

                case inputPayment>totalBill:
                alert('Anda akan mendapat kembalian sebesar Rp' + parseInt(inputPayment-totalBill));
                break;

                case inputPayment=totalBill:
                alert('Uang Anda pas');
                break;
            }
            break;
    }

    // This is to end the infinite loop and close the app
    if(userInput === 4)
    {
    break;
    }
}