Transcript Visual Basic.net Loops Loops • Used to do multiple executions of the same block of code • Do while loops • Do until loops • For next loops Do.

Visual Basic.net
Loops
Loops
• Used to do multiple
executions of the same block
of code
• Do while loops
• Do until loops
• For next loops
Do while loop (Syntax)
Do while (condition)
[loop instructions]
Loop
Do while loop (example)
Dim intCount as Integer ‘
declare local variable
Intcount = 1 ‘ initialing counter
to 1
Do while intCount <= 3 ‘ loop
while count is <= 3
Print intCount ‘ print intCount
to the printer
intCount = intCount + 1 ‘ add
1 to intCount
Loop ‘ redo the block of code
until false
Do while (Flowchart)
Start
Declare intCount
variable
intCount = 1
intCount <= 3
T
Display
intCount
intCount = intCount + 1
Stop
Do until loop (Syntax)
Do
[loop instructions]
Loop until (condition)
Do until (example)
Dim intCount as Integer ‘
declare a local variable
intCount = 1 ‘ initializing
counter to 1
Do ‘ redo block of code until
false
Print intCount ‘ print intCount
to the printer
intCount = intCount + 1 ‘ add
1 to intCount
Loop until intCount > 3 ‘ loop
until > 3
Do until (Flowchart)
Start
Declare intCount
variable
intCount = 1
Display
intCount
intCount = intCount + 1
T
F
intCount > 3
Stop
For Next Loop
AKA an automatic counter loop
Repeats a block of code
statements a specified
number of times
For Next (Syntax)
For counter = startvalue to
endvalue [Step stepvalue]
[instructions]
Next counter
For Next (Example)
For intCount = 1 to 3 Step 1 ‘
initializing
Print intCount ‘ prints out
intCount
Next intCount ‘ loop
For Next (Flowchart)
Start
Declare intCount variable
For for next loop
intCount
>3
1
1
Print
intCount
Stop