The while Statement of C #

The while statement conditionally executes the inline statement 0 times or several times. The format of the statement is:

while (boolean-expression) embedded-statement

The order in which it is executed is:

(1) Computes the value of the Boolean expression boolean-expression.
(2) When the value of the Boolean expression is true, execute the inline statement embedded-statement, and the program moves to step 1th;
(3) When the value of the Boolean expression is false, the while loop ends;

Let's look at a simple example that finds a specified value in an array, returns an array subscript if found, or returns and reports:

Program Listing 8-3:

Using System;
Class Test
{
  static int find (int value,int[] array)
   {
    int i=0;
    while (Array[i]!=value) {
     if (++i>array). Length)
       Console.WriteLine ("Can not find");
   }
   return i;
  }
  static void Main () {
    Console.WriteLine (3,new int[] {5,4,3,2,1});
   }

The while statement allows you to use a break statement to end a loop, execute a subsequent statement, or use a continue statement to stop the execution of the inline statement and continue with the while loop.

We use the following program fragment to compute the factorial value of an integer x:

Long Y=1;

while (true)
{
  y*=x;
  x--;
  if (x==0) {break
    ;
  }
}