C# Loop Examples

In this chapter you will learn how to implement loop constructs in C# programming. There are some programming examples are given below that will help you to understand loop constructs in C#.

Qu 1: Write a program to display table of given number.

Example:

---

using System;

namespace Examples1
{
  class Program
   {
     static void Main(string[] args)
      {
        int num, i,result;
        Console.Write("Enter a number\t");
        num = Convert.ToInt32(Console.ReadLine());

        for (i = 1; i <= 10; i++)
         {
           result = num * i;
           Console.WriteLine("{0} x {1} = {2}", num, i,                result);
         }
        Console.ReadLine();
      }
   }
}

---

Output

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Enter a number     8
8 x 1 = 8
8 x 2 = 16
8 x 3 = 24
8 x 4 = 32
8 x 5 = 40
8 x 6 = 48
8 x 7 = 56
8 x 8 = 64
8 x 9 = 72
8 x 10 = 80

---

Qu2: Write a program to print following output using for loop.

1
22
333
4444
55555

Example:

---

using System;

namespace Example2
{
  class Program
   {
     static void Main(string[] args)
      {
        int i,j;
        i=0;
        j=0;

        for (i = 1; i <= 5; i++)
         {
           for (j = 1; j <= i; j++)
            {
              Console.Write(i);
            }
           Console.Write("\n");
         }
        Console.ReadLine();
      }
   }
}

---

Output

---

1
22
333
4444
55555