double result = EX1(67.99);

double result = EX1(67.99);

public class Program
{
    public static void Main()
    {
    
        double EX1(double x)
        {
            return x * x;
        }
    }
}

public class Program
{
    public static void Main()
    {
    
        double EX1(double x)
        {
            return x * x;
        }
    }
}