# Get the friday and satureday night of each day

The question is that I need to find each Saturday and Friday night and charge them 140 on Friday or Saturday. Do I use a while loop??

```
DateTime ArrivalDate = DateTime.Parse(txtArrivalDate.Text);
DateTime DepartureDate = DateTime.Parse(txtDepartureDate.Text);
TimeSpan numberOfNights = DepartureDate.Subtract(ArrivalDate);
decimal nights = numberOfNights.Days;
txtNights.Text = nights.ToString();
//txtTotalPrice
decimal pricePerNight = 120.00m;
decimal totalNight = nights * pricePerNight;
txtTotalPrice.Text = "$" + totalNight.ToString();
txtAvgPrice.Text = "$" + pricePerNight.ToString();
// finds the fridays
decimal morePricePerNight = 140.00m;
int i = 0;
// while loop
while (ArrivalDate.DayOfWeek != DayOfWeek.Friday)
{
ArrivalDate = ArrivalDate.AddDays(1);
}
while (DepartureDate.DayOfWeek != DayOfWeek.Friday)
{
DepartureDate = DepartureDate.AddDays(1);
}
```

Dmitry S
answered question

pstrjds
commented

Not an exact duplicate but closely related - stackoverflow.com/q/248273/416574

## Have an answer?

JD

Instead of a loop you could use a little math and just calculate the number of Fridays and Saturdays between the two dates.