C# do While Loop

do while loop treats same as while loop but only differences between them is that, do while executes at least one time. The code executes first then check for specified loop condition. But in while loop, the specified loop condition evaluated first then executes the code. A simple demonstration will help you to figure out do while loop more clearly.

Example:

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using System;

namespace do_while
{
  class Program
   {
     static void Main(string[] args)
      {
        int table,i,res;
        table=12;
        i=1;
        do
         {
           res = table * i;
           Console.WriteLine("{0} x {1} = {2}", table, i,res);
           i++;
         }
        // must put semi-colon(;) at the end of while condition in do...while loop.
        while (i <= 10);

        Console.ReadLine();
      }
   }
}

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 Note: You must put semi-colon(;) at the end of while condition in do…while loop.

 Output

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12 x 1 = 12
12 x 2 = 24
12 x 3 = 36
12 x 4 = 48
12 x 5 = 60
12 x 6 = 72
12 x 7 = 84
12 x 8 = 92
12 x 9 = 108
12 x 10 = 120

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