For…Next : Nested Loop

X= 0For i = 0 To 4

For j = 0 To i-1X=X+(i+j-1)

Next jNext i

How many times the inner loop is executed?

What is x at the end of this loop?

Nested For…Next : Executioni=0j=0-1

i=1j=00

i=2j=01

i=3j=02

i=4j=03

No. of times inner loop is executed

0 1 2 3 4

x 0 0 13

5812

15192430

For…Next : Exit

X= 0For i = 0 To 4

For j = 0 To i-1

If x > 5 ThenExit For

End Ifx=x+(i+j-1)

Next jNext I

Exit from the inner loop

Do…Loop

Do While logical expression

Executable statement(s)Loop

Do

Executable statement(s)Loop Until logical expression

Do While…Loop

Expression

Statement(s)True

False

Do…Loop Until…

Statement(s)

Expression

True

False

Do Loops

Sum = 0Kount = 0

Do While Kount <= 10Sum = Sum + KountKount = Kount + 1

Loop

Sum = 55

Kount = 11

Sum = 0Kount = 0

DoSum = Sum + KountKount = Kount + 1

Loop Until Kount > 10

Sum = 55

Kount = 11

Decimal to Binary : Do While

Private Sub Command1_Click()Dim Deci As IntegerDim R As Byte, Bin As String

Deci = Text1.TextBin = ""Picture1.Cls

If Deci = 0 Then Bin = Str(Deci)End If

Do While Deci > 0 R = Deci Mod 2 Bin = Str(R) + Bin Deci = Deci \ 2Loop

Picture1.Print Bin

End Sub

Decimal To Binary: Do…Until

Private Sub Command3_Click()Dim Deci As IntegerDim R As Byte, Bin As String

Deci = Text1.TextBin = ""Picture1.Cls

Do R = Deci Mod 2 Bin = Str(R) + Bin Deci = Deci \ 2Loop Until Deci = 0

Picture1.Print BinEnd Sub

File Handling

Files are used for large data input/output

Create a .txt file called CarData by using Notepad (or ASCII file using other software) with following contents

“Suzuki”, 3, 4

“Toyota”, 5, 7

“Honda”, 4, 15

File Handling

Files must be Opened before any read/write operation.

Files must be Closed after any read/write operation

SyntaxOpen “CarData” For Input As #138

Opens a file called CarData.txt for read-only and this file will be called #138

The file reference number can be from 1 to 255