Repeating statements while a condition is true, Visual Basic Programming

Assignment Help:

Use the While keyword to verify a condition in a Do...Loop statement. You can verify the condition before you enter the loop (as illustrated in the following ChkFirstWhile instance), or you can verify it after the loop has run at least once (as illustrated in the ChkLastWhile instance). In the ChkFirstWhile procedure, if myNum is set to 9 rather than 20, the statements inside the loop will never run. In the ChkLastWhile process, the statements inside the loop run only once since the condition is already False.

Sub ChkFirstWhile() Dim counter, myNum counter = 0

myNum = 20

Do While myNum > 10 myNum = myNum - 1 counter = counter + 1

Loop

MsgBox "The loop made " & counter & " repetitions." End Sub

Sub ChkLastWhile() Dim counter, myNum counter = 0

myNum = 9

Do

myNum = myNum - 1 counter = counter + 1

Loop While myNum > 10

MsgBox "The loop made " & counter & " repetitions." End Sub

The above figure illustrate two example code fragments illustrating the do... loop and do while ... loop statements. In the first loop the condition is verified before executing the code however in the second loop the statements are first executed once and after that the condition is verified. In the first loop the instructions given in the loop's body will never be executed if the condition initially fails but in the second loop these instructions would be executed at least once.  The following flow chart illustrates the execution plan of the second procedure i.e. CheckLastWhile:

1225_Repeating Statements While a Condition is True.png

                Figure: Execution Plan of the Second Loop


Related Discussions:- Repeating statements while a condition is true

Use of wm_size message - class wizard, Use of WM_SIZE Message: Wheneve...

Use of WM_SIZE Message: Whenever the WM_SIZE message is handled and the graphical objects on the output window will also change consequently to the output window. The functi

Coding, Write an event procedure to automate the billing system of a superm...

Write an event procedure to automate the billing system of a supermarket. Give the details of database tables, forms, controls and menu design (if any). Make assumptions, wherever

Descriptive variable and procedure names, The body of variable or procedure...

The body of variable or procedure name must use mixed case and complete as essential to define its purpose. Additionally, procedure names must begin with a verb, such as CloseDialo

Create a procedure - vbscript, Each piece of data is passed in your process...

Each piece of data is passed in your process using an argument. Arguments serve like placeholders for the data you wish to pass into your process. You can name your arguments along

Need help on macros in visual basic, I have an excel list with a lot's of s...

I have an excel list with a lot's of serial numbers that have been entered by hand from PDFs online (1-5 serial numbers per PDF). Many of the values are duplicates, wrong, or conta

Vbscript error object clear method, Methods: VBScript Err Object ...

Methods: VBScript Err Object Clear Method Clears every property settings. Raise Method Generate a run-time error.

Vb.net applications, outline and explain in detail any 10 applications of v...

outline and explain in detail any 10 applications of vb.net

Help context property, Sets or returns context ID for topic in Help File. I...

Sets or returns context ID for topic in Help File. If Help file is indicated in the VBScript Err Object HelpFile Property, the HelpContext property is utilized to display automatic

Control statements, CONTROL STATEMENTS   The conditional expression us...

CONTROL STATEMENTS   The conditional expression uses a comparison operator that results in true or false value. If the comparison is valid the outcome is true, or else the out

Scalar variables and array variables, Mostly time, you just desire to assig...

Mostly time, you just desire to assign a single value to a variable you have declared. A variable having a single value is a scalar variable. At other times, this is convenient to

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd