How to use the C # while loop statement

First of all, the difference between foreach and for, foreach is for the object traversal, do not need to define the number of cycles, but there is a disadvantage, the foreach traversal is read-only data, can not be in a Foreach object additions and deletions, and the for loop can be. Your code to change to a while loop is as follows:

The code is as follows	Copy Code
int I=0;while (i<ds. table["Userreg"]. Rows.Count) {i++;}

Cases

The code is as follows	Copy Code
Using System; Using System.Collections.Generic; Using System.Linq; Using System.Text; Namespace Interrupt Loop { Class Program { static void Main (string[] args) { 100 or less, seven. int i = 0; while (I < 100) { i++; if (i%7==0 | | i%10==7| | I/10==7) { Continue } Console.WriteLine ("{0}", i); } Console.readkey (); } } }

the difference between the Return,continue,break in the while.

Return: Exit main function

Continue: Directly to the next round cycle

Break: Jump right out of the current loop