Do Loop in VB.net

By: Ramlak Emailed: 1589 times Printed: 2041 times    

Latest comments
By: rohit kumar - how this program is work
By: Kirti - Hi..thx for the hadoop in
By: Spijker - I have altered the code a
By: ali mohammed - why we use the java in ne
By: ali mohammed - why we use the java in ne
By: mizhelle - when I exported the data
By: raul - no output as well, i'm ge
By: Rajesh - thanx very much...
By: Suindu De - Suppose we are executing

The Do loop keeps executing its enclosed statements while or until (depending on which keyword you use, While or Until) condition is true. You can also terminate a Do loop at any time with an Exit Do statement. The Do loop has two versions; you can either evaluate a condition at the beginning:

Do [{While | Until} condition ]
    [statements]
    [Exit Do]
    [statements]
Loop

or at the end:

Do
    [statements]
    [Exit Do]
    [statements]
Loop [{While | Until} condition]

Here's an example where the code keeps displaying the message "What should I do?" until the user types "Stop" (note that I'm using UCase to uppercase what the user types and comparing it to "STOP" to let them use any combination of case when they type "Stop"):

Module Module1
    Sub Main()
        Dim strInput As String
        Do Until UCase(strInput) = "STOP"
            System.Console.WriteLine("What should I do?")
            strInput = System.Console.ReadLine()
        Loop
    End Sub
End Module
Tip 

The second form of the Do loop insures that the body of the loop is executed at least once.


VB.net Home | All VB.net Tutorials | Latest VB.net Tutorials

Sponsored Links

If this tutorial doesn't answer your question, or you have a specific question, just ask an expert here. Post your question to get a direct answer.



Bookmark and Share

Comments(0)


Be the first one to add a comment

Your name (required):


Your email(required, will not be shown to the public):


Your sites URL (optional):


Your comments:



More Tutorials by Ramlak
While Loop in VB.net
For Each…Next Loop in VB.net
For Loop in VB.net
Do Loop in VB.net
Setting Up SSL on Tomcat
Unicode and UTF-8 in C
Sample program to demonstrate the use of ActionListener
java.io.IOException: HTTPS hostname wrong: should be
javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
NotifyUtil::java.net.ConnectException: Connection refused: connect
'LINK.EXE' is not recognized as an internal or ext
Using Transactions in JDBC
What is the ACID principal?
How connection pooling works in Java and JDBC
A simple JDBC application sample code

More Tutorials in VB.net
Scope in VB.net
Unstructured Exception Handling in VB.net
Structured Exception Handling in VB.net
Creating Sub Procedures in VB.net
Creating Functions in VB.net
Passing a Variable Number of Arguments to Procedures in VB.net
Specifying Optional Arguments with default values in Procedures in VB.net
Preserving a Variable's Values between Procedure Calls in VB.net
Procedure Delegates in VB.net
Properties in VB.net
Understanding Scope in VB.net
Using Resume Next and Resume Line in VB.net
Using On Error GoTo 0 in VB.net
Getting an Exception's Number and Description in VB.net
Raising an Exception Intentionally in VB.net

More Latest News
Most Viewed Articles (in VB.net )
Your first VB.NET Crystal Reports - A step by step guide
How to export from DataGridView to excel using VB.net
Operators in VB.net
Sub Procedures and Functions in VB.net
How To Connect To A MySql Database in VB.net
Update cell data in an Excel file using OLEDB in VB.net
Multi threaded Socket Programming in VB.net
Visual Basic Statements
String.Contains (), compare, clone in VB.net
To read the entire worksheet in an Excel workbook through VB.net Code
How to export from database to excel using VB.net
Sending email using CDOSYS in VB.net
Server Socket Program sample in VB.net
Creating Sub Procedures in VB.net
Throwing an Exception in VB.net
Most Emailed Articles (in VB.net)
How to export from DataGridView to excel using VB.net
“Using If with And” and Comparing two integers using If
While Loop in VB.net
How to find IP Address of Host using .net code
Send SMS using VB code
The Select Case statement in VB.net
The For Loop in VB.net
Operators in VB.net
Do Loop in VB.net
Sub Procedures and Functions in VB.net
Export Chart from Excel 2007 as Picture file in VB.NET 2005
Using Excel 2007 Chart VB.net Picture Box
Using Excel 2007 DataBar in VB.net
Multi Threaded Server Socket Programming in VB.net
Using Finally in VB.net