How can we implement for and foreach loop in c#

For Loop:-

  int[] myname = new int[1];
        int count = 0;
        for (int i = 0; i < myname.Length; i++)
        {
            count += myname[i];
        }

Foreach Loop:-

 string[] days = { "sunday", "Monday", "Wednesday", "Thursday", "Friday", "Saturday", "sunday" };
        foreach (string day in days)
        {
            Label1.Text = day.ToString();
        }
The above C# example first declared a string array 'days' and initialize the days in a week to that array. In the foreach loop declare a string 'day' and pull out the values from the array one by one and displayed it.

How to switch case statement:

 int val=5;
        switch (val)
        {
            case 1:
                Label1.Text = "Sunday";
                break;
            case 2:
                Label1.Text = "Monday";
                break;
            case 3:
                Label1.Text = "Tuesday";
                break;
            case 4:
                Label1.Text = "Wednesday";
                break;
            case 5:
                Label1.Text = "Thrusday";
                break;
            case 6:
                Label1.Text = "Friday";
                break;
            case 7:
                Label1.Text = "Saturday";
                break;

        }