For loops and while loops in c#

The loops are used for repeating a statement or group of statement.

For Loop:
We need the following,to use this loop.
1.A starting value to initialize the loop.
2.A condition for running the loop.
3.An operation to update the loop.

Example:

static void Main(string[]args)
{
   int i, num,sum;
   sum=0;
   for(i = 0; i < 5; i ++)
   {
      Console.WriteLine("Enter a number");
      num = int.Parse(Console.ReadLine());
      sum = sum + num;
   }
   Console.WriteLine("The sum of all the numbers is {0}", sum);
}

While Loop
The while loop is almost similar to the 'for loop' with some difference in the syntax.

Example:

static void Main(string[]args)
{
   int i, num, sum;
   sum = 0;
   i =0;
   while(i < 5)
   {
      Console.WriteLine("Enter a number");
      num = int.Parse(Console.ReadLine());
      sum = sum + num; i ++;
   }
   Console.WriteLine("The sum of all the numbers is {0}", sum);
}