Repetition

Repetition is called iteration.this is a loop statement. 

SEQUENCE SYSTEM

 SOURCE CODE

OUTPUT:

Explanation:

 I used vb v6.0 in creating this sample program. First i choose a form then input 3 Label boxes, 4 text boxes and 2 command buttons.I changed their name and Caption. next I coded the program  in the code window of the command button then i tested if it is check or error.

Purpose of the sample program:  To Record  student Informations.

SELECTION SYSTEM

SOURCE CODE

OUTPUT

SELECTION CONSTRUCT IS PROGRAM CONSISTS OF CONDITIONAL STATEMENT:

 ~~   I used if ans else statements.

This system purpose is for a security system,where you will input your username and password.

1. PROGRAMMING READABILITY

  

  Use Meaningful identifiers:

Dim intRandom As Integer, intSum As Integer

Dim intCounter As Integer

  Logic Structure:

for this program I used For and Next statement.

For intCounter = 1 To intRandom Step 1

    intsum + inSum = intCounter

Next intCounter

  lblDisplay.Caption = "The sum of 1 to " & intRandom & " is " & intSum

End Sub 

  Coding Practice:

intRandom = 0

intSum = 0

intCounter = 0

lblNumber = ""

lblDisplay = ""

cmdGenerate.Enabled = True

cmdReset.Enabled = False

cmdGenerate.Focus

End Sub

  Notes and Comments:

I didn't used notes and comments for this program.

2. PROGRAM DOCUMENTATION

   Program listing:

For my commandButton i used

cmdGenerate, cmdAdd , cmdReset

for my labelbox i used 

lblNumber and lblDisplay

   Program specification:

I used the Visual Basic 6.o for my program.

   File layouts and Record Description:

Dim intRandom As Integer, intSum As Integer

Dim intCounter As Integer

  Operating Instructions: