Visual basic 2010 functions

1. Electroteam__@hotmail.com
Interesting Education
Electro-Team
Visual Basic 2010
Functions II

2. This Slides Will Cover
1. The Right Function.
2. The Left Function.
3. The Trim Function.
4. The Ltrim & Rtrim Function.
5. The InStr function.
6. The Ucase and the Lcase Functions.
7. The Abs Function.
8. The Exp function..
9. The Fix Function.
10. The Int Function.
11. The Rnd( ) Function.
12. The Round Function.

3. Open new project and add 2 Labels, 1 Textbox and 1 Button

4. 1. The Right Function
The format is:-
Microsoft.Visualbasic.Right ("Phrase", n)
Example
Microsoft.Visualbasic.Right (“Hello World", 5)=World

5. Label1
Text = Right Function
Font = 18 , Bold
Format Center in FormHorizontally
Label2
Text = …………
Font = 16 , Bold
Button1
Text = Go
Font = 14 , Bold
Form1
Text = Right Function Ex.
Start Position = Center Screen

7. Button1 Code
Private Sub Button1_Click
Label2.Text = Microsoft.VisualBasic.Right(TextBox1.Text, 5)
End Sub

8. 2. The Left Function
The format is:-
Microsoft.Visualbasic.Left ("Phrase", n)
Modify Previous Program code ..
Private Sub Button1_Click
Label2.Text = Microsoft.VisualBasic.Left(TextBox1.Text, 5)
End Sub

9. Run Time

10. 3. The Trim Function
The format is:-
Trim("Phrase")
Example:
Trim (" Visual Basic ") = Visual basic
Modify Previous Program code ..
Private Sub Button1_Click
Label2.Text = Trim(TextBox1.Text)
End Sub

11. Run Time

12. 4. The Ltrim & Rtrim Function
The Ltrim Function
The format is:
Ltrim("Phrase")
Example:-
Ltrim (" Visual Basic")= Visual basic
The Rtrim Function
The format is:
Rtrim("Phrase")
Example
Rtrim ("Visual Basic ") = Visual Basic

13. 5. The InStr function
The format is:
Instr (n, original phase, embedded phrase)
Where n is the position where the Instr function will
begin to look for the embedded phrase.
Private Sub Button1_Click
Label2.Text = InStr(1, TextBox1.Text, "Egypt")
End Sub

14. Run Time

15. Modify Button1 code
Label2.Text = InStr(1, TextBox1.Text, "t")
Modify Button1 code
Label2.Text = InStr(5, TextBox1.Text, "t")
And note the difference

16. 6. The Ucase and the Lcase Functions
The Ucase function converts all the characters of a string
to capital letters.
The Lcase function converts all the characters of a string
to small letters.
The format is:-
Microsoft.VisualBasic.UCase(Phrase)
Microsoft.VisualBasic.LCase(Phrase)

17. 7. The Abs Function
Return the absolute value of a given number.
The syntax is
Math. Abs (number)
The Math keyword here indicates that the Abs
function belong to the Math class.

18. Run Time
Private Sub Button1_Click
Label2.Text = Math.Abs(Val(TextBox1.Text))
End Sub

19. 8. The Exp function
The Exp of a number x is the exponential value
of x………., i.e. e^x
Exp(1)=e=2.71828182
The syntax is:
Math.Exp (number)

20. 9. The Fix Function
The Fix function truncate the decimal part of a
positive number and returns the largest integer
smaller than the number.
The syntax is:
Fix(number)

21. Private Sub Button1_Click
Label2.Text = Fix(Val(TextBox1.Text))
End Sub

22. 10. The Int Function
Example:-
Int(2.4)=2, Int(6.9)=6 , Int(-5.7)=-6
(XI) The Log Function
Example:-
Log(10)=2.302585

23. 11. The Rnd( ) Function
The Rnd function returns a random value
between 0 and 1.
The traditional usage of this function is to covert
its result to integer value …using the formula.
Int(Rnd() * 10)
Modify Previous Program code ..
Private Sub Button1_Click()
Label2.Text = Int(Rnd() * 10)
End Sub

24. Run Time

25. 12. The Round Function
The Round function is the function that rounds
up a number to a certain number of decimal
places. The Format is Round (n, m) which means
to round a number n to m decimal places. For
Example:-
Math.Round (7.2567, 2) =7.26

26. Run Time

27. Produced by
Electro-Team
Electroteam__@hotmail.com