public static void Main()
const int lowerLimit = 20;
const int upperLimit = 55;
int[] test = new int[] {-10, 0, 15, 19, 20, 21, 25, 40, 55, 56, 90};
if (speed < lowerLimit) speed = lowerLimit;
else if (speed > upperLimit) speed = upperLimit;
Console.WriteLine("Speed: {0,4:N0} -> {1,3:N0}", i, speed);