Modul ke:FakultasProgram StudiPEMOGRAMAN VISUAL CLIENT SERVERForm Variable, Data Type, Operator, Condition, IterationHariesa B.P, ST, MM04FASILKOMSistem Informasi

Module OverviewDeclaring Variable and assigning valuesData TypeOperatorConditionIteration

Variables

VariablesA variable represents a named location in memory for piece of data. An application can access a piece of data by using the variable it has been assigned to.A varible has the following six facets:Name : Unique identifier that refer to the variable in codeAddress : Memory location of the variable.Data type : Type and size of data that the variable can storeValue : Value at the address of the variable.Scope : Define area of code that can access and use the variable.Lifetime : Period of time that a variable is valid and available for useExamples of variable As a counter for loop structureAs Temporary storage for property valuesAs a container to store a value that was return from a function

Data Type

Data Type

Declaring & Assigning VariablesNote :C# is case sensitive. Variable MyData is not the same with myData

Declaring & Assigning Variables

What is variable scopeVariable can have one of the following level of scope BlockProcedureClassNamespace

What is variable scope

Converting a Value to Different Data TypeThere are two type of conversions :Implicit conversion. Automatically performed by the common language runtime (CLR) on operations that are guaranteed to succeedExplicit conversion. Require to write code to perform a conversion that otherwise could lose information or procedure an error.

Converting a Value to Different Data Type

Implicit Conversion

Explicit ConversationClass for conversation :System.Convert

Operators

Operators Assignment

Decision Statement

Using One Way If Statement

Using ? Or If Statement

Using ? Or If Statement

Using Multiple Outcome If Statement

Using the Switch Statement

Using the Switch Statement

Guideline for Choosing a Decision Construct

Practice Right click on the solution name, Add new project, click visual C#, click windows, click windows form, give the project name with latihan4Right click on project name, click set as startup projectCreate a New Form and name as DecisionForm

FieldDescriptionNameDecisionFormTextdecision Form AplikasiStartPositionCenterScreen

Decision FormAdd 2 textbox, 2 label and 3 button

Properties Label

FieldDescriptionNamelabel1TextVariabel 1Name Label2TextVariabel 2

Properties TextBox

FieldDescriptionNametbVar1Name tbVar2

Properties Button

FieldDescriptionNamebtnIfTextGO IfName btnItenaryTextGO ?NamebtnSwitchTextGo Switch

Code For btnIf

Code for btnItenarySet as to run for first time then click F5

Code for btnSwitch

Iteration Statement

Type Of Iteration Statement

While Statement

Do Loop Statement

For Statement

Break & Continue Statment

PracticeCreate a New Form and name as IterationForm

FieldDescriptionNameIterationFormTextIteration Form AplikasiStartPositionCenterScreen

Layout Iteration FormAdd 2 Label, 2 textbox and 3 Button

Properties Label

FieldDescriptionNamelabel1TextNilai AwalNamelabel2TextBatas AKhir

Properties TextBox

FieldDescriptionNametextbox1 -> tbNilaiAwalNametextbox2 -> tbCounter

Properties Button

FieldDescriptionNamebtnWhileTextWhileName btnDoTextDoNamebtnForTextFor

Code For btnWhile

Code For btnDo

Code for btnForSet as the Form for run, then click F5

ReferenceMCT 10266MCT 2546netIndonesia.netMSDN

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