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Week 1 – 3 Recap ,[object Object],[object Object]

VB.NET Week 1 ,[object Object],[object Object],[object Object],[object Object]

Coding Conventions ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

VB.NET Week 2 ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Variables - Declaring ,[object Object],[object Object],[object Object],[object Object],[object Object]

Variables - Declaring ,[object Object],Single: single-precision decimal (floating point) Double: double-precision decimal True, False Boolean 8 bytes to store date and time Date 8 bytes to store decimals (others: Single, Decimal) Double 4 bytes to store whole number (others: Short, Long) Integer word or sentence (for just one character: Char) String

Java ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Variables - assigning ,[object Object],[object Object],[object Object],[object Object],[object Object]

Variables - assigning ,[object Object],[object Object],[object Object]

Arithmetics Operators Division / Multiplication * Subtraction - Addition +

Other Arithmetic Operators ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Do not have these operators ,[object Object],[object Object],[object Object]

Comparison Operators Comparison operators are used to in condition Eg If (condition) doSomthing 4 <> 4 (false) 4 <> 5 (true) 5 <> 4 (true) <> (not equal to) 4 = 4 (true) 4 = 5 (false) 5 = 4 (false) = (equals) Examples Operator

Comparison Operators 4 < 4 (false) 4 < 5 (true) 5 < 4 (false) < (less than) 4 > 4 (false) 4 > 5 (false) 5 > 4 (true) > (greater than) Examples Operator

Comparison Operators 4 <= 4 (true) 4 <= 5 (true) 5 <= 4 (false) <= (less than or equal to) 4 >= 4 (true) 4 >= 5 (false) 5 >= 4 (true) >= (greater than or equal to) Examples Operator

Conversion from String to other types Use CType if you are not sure the name of the conversion function Example: to convert to Boolean CType(variableName, Boolean)

Type Conversion examples ,[object Object],[object Object],[object Object],[object Object],[object Object],c i n t c s t r

Maths Functions ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Class vs Local variables ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],x = 5 ' OK or Not? y = 5 ' OK or Not? x = 5 ' OK or Not? y = 5 ' OK or Not?

VB.NET lesson week ,[object Object],[object Object],[object Object],[object Object]

Get Input from User Dim name As String name = InputBox ("Enter your name:") MsgBox ("Your name is " & name)

If Then Else, Else If ,[object Object],[object Object],[object Object],[object Object],Else : ElseIf condition2 Then ' Can repeat for : ' more conditions Example If name <> "" Then MsgBox(name) End If Example If name <> "" Then MsgBox(name) Else MsgBox("Empty") End If Example If name = "" Then MsgBox("Empty") ElseIf name = "me" Then MsgBox("Me") Else MsgBox(name) End If

More than one condition ,[object Object],[object Object],[object Object],[object Object],Once i > 0 is false, no need to check j <> 5

More than one condition ,[object Object],[object Object],[object Object],[object Object],Once i > 0 is true, no need to check j <> 5

Short cut If and Assignment ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Select Case ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Example Select Case name Case "" MsgBox("Empty") Case "Me" MsgBox("me") Case Else MsgBox(name) End Select

Select Case Conditions ,[object Object],[object Object],[object Object],[object Object],[object Object]

Java ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],switch variable { case 1: : break; case 2: : break; default: : }

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