VB.NET

1. Decision making
1
Shyam N. Chawda +91 78 74 39 11 91

2. It’s decide the flow of program
2 types
• Branching statements, Test Structure, Decision
Structure
• Loop statements
2
Shyam N. Chawda 9374928879

3. Branching Statements
• If, Select case
Loop Statements
• For,Do,While
3
Shyam N. Chawda 9374928879

4. If condition Then
Logic…
End if
If condition Then
Logic…
Else
Logic….
End if
If condition Then
Logic…
ElseIf condition-n Then
Logic..
Else
Logic…
End If
4
Shyam N. Chawda 9374928879

5. If TotalMarks>150 then
Logic..
End if
If a=b then
Logic..
Else
Logic..
End if
If Marks>0 and Marks<50 then
Logic..
Else if Marks>=50 and Marks<100
then
Logic..
Else if Marks>=100 and Marks<150
then
Logic..
End if
5
Shyam N. Chawda 9374928879

6. When it finds a True condition
Else statement block, which Visual
Basic.net executes if none of the conditions
are True.
You can have any number of ElseIf
6
Shyam N. Chawda 9374928879

7.  You can use And / Or condition with it.
 Example:
If marks>50 and marks<100 then
statements
Else if marks>=100 and marks<150 then
statements
End if
7
Shyam N. Chawda 9374928879

8. Leap Year
Odd,Even
Positive ,Negative
Maximum,Minimum number
Mark of students
• Between 0 - 50,50 –100 ,100-150
8
Shyam N. Chawda 9374928879

9. Whereas the If and ElseIf statements
can evaluate a different expression in
each statement,
The Select statement evaluates a
single expression only once and uses
it for every comparison.
9
Shyam N. Chawda 9374928879

10. Select Case testexpression
[Case expressionlist-n
[statements-n]] ...
[Case Else
[elsestatements]]
End Select
10
Shyam N. Chawda 9374928879

11. Select Performance
Case 1 ' Performance is 1.
Return Salary * 0.1
Case 2, 3 ' Performance is 2 or 3.
Return Salary * 0.09
Case 5 To 7 ' Performance is 5, 6, or 7.
Return Salary * 0.07
11
Shyam N. Chawda 9374928879

12. Case 4, 8 To 10 ‘Performance is 4, 8, 9, or 10.
Return Salary * 0.05
Case Is < 14 'Performance is 11, 12, 13.
Return 100
Case Else ' Performance is < 1 or > 14.
Return 0
End select
12
Shyam N. Chawda 9374928879

13. Select Case JobPlace
Case “Ahmedabad”
logic…
Case “Mumbai”,”Delhi”,”Chennai”
logic..
Case Else
logic..
End select 13
Shyam N. Chawda 9374928879

14. If multiple Case statements are True,
only the statements belonging to the
first true Case statement are
executed.
Case Else clause must be the last
Case clause.
14
Shyam N. Chawda 9374928879

15. Use the To keyword to specify a
range of values.
The Is keyword is used to precede
any comparison operators.
15
Shyam N. Chawda 9374928879

16. Enter Color name and according
to it textbox color will change
Enter student no according to no
display message “Good”,”Try best
in next exam”,”Need to improve”
16
Shyam N. Chawda 9374928879

17. Any questions?
www.shyamsir.com
Shyam N. Chawda 9374928879 17