private static double THR(int Age, double Rest){
double THR = ((220 - Age) - Rest) * 0.6 + Rest;
public static void Main()
Console.WriteLine("THR Calculator");
Console.WriteLine("Age:");
int Age = Convert.ToInt32(Console.ReadLine());
Console.WriteLine("heart rate at rest:");
double Rest = Convert.ToDouble(Console.ReadLine());
double uTHR = THR(Age,Rest);
Console.WriteLine("Your THR is: "+uTHR);