llckeron.blogg.se - Visual basic data types

#VISUAL BASIC DATA TYPES HOW TO#
#VISUAL BASIC DATA TYPES CODE#

When creating an application, you may need a way of getting input from the user. Creating a Message Box dialog to show some text and the value of variable name.Assigning a variable of Guru99 to the variable name.Creating a Message Box dialog to show some text and the value of variable x.Assigning a value of 32 to the variable x.Creating a Message Box dialog to show some text and the value of variable checker.Assigning a value of True to the checker variable.Creating a Boolean variable named checker.The Handles Button1.Click states that the subprocedure will handle any click on the button. EventArgs forms the base class for all VB.Net event arguments. The sender object will raise the event while the e argument will have data for the event. It will be called when the button is clicked. Creating a sub procedure named Button1_Click.

#VISUAL BASIC DATA TYPES CODE#

Here is a screenshot of the complete code for the above: It should be as follows:Īgain, click the OK button to move to the next dialog. You should get the following dialog:Ĭlick the OK button to move to the next dialog. Step 6) You should get the following form: Step 5) You can now run the code by clicking the Start button located at the top bar: MsgBox("The value of variable name is : " & name) MsgBox("The value of variable x is : " & x) MsgBox("The value of variable checker is : " & checker) Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click Step 4) Add the following code to add text to the control:

You can also double click the button that you have added to the form. Step 3) Click the other tab located to the left of the design tab. Drag the Button control from the toolbox into the WindowForm:.To create a Button, begin by opening the design tab.Give it a name and click the OK button.On the new window, click Visual Basic from the left vertical navigation pane.

Open Visual Studio and click the File menu, Choose New then Project from the toolbar.

#VISUAL BASIC DATA TYPES HOW TO#

Let us demonstrate how to declare and initialize a variable using a code example: For example:Ībove, we have defined a Boolean variable named checker and assigned it a value of True. If you declare a Boolean variable, its value must be either True or false. Here is another example:Ībove, we have declared a string variable name and assigned it a value of John. The following example demonstrates this:Ībove, we have declared an integer variable named ‘x’ and assigned it a value of 10. Initializing a variable means assigning a value to the variable. In the above example, ‘x’ is the variable name while Integer is the data type to which variable x belongs. Here is an example of a valid variable declaration in VB.NET: In the above syntax, Variable_Name is the variable name while Data_Type is the name to which the variable belongs.

In VB.NET, the declaration of a variable involves giving the variable a name and defining the data type to which it belongs.

CShort(expression): converts the expression to a Short data type.

CSByte(expression): converts the expression to a Byte data type.

CStr(expression): converts the expression to a String data type.

CObj(expression): converts the expression to an Object data type.

CInt(expression): converts the expression to an Integer data type.

CDec(expression): converts the expression to a Decimal data type.

CLng(expression): converts the expression to a Long data type.

CChar(expression): converts the expression to a Char data type.

CByte (expression): converts the expression to a byte data type.

CDbl(expression): converts the expression to a Double data type.

CDate(expression): converts the expression to a Date data type.

CBool (expression): converts the expression to a Boolean data type.

There are functions that we can use to convert from one data type to another. Values range from 0 to about 2 billion Unicode characters.

String: The storage space allocated depends on the platform of implementation.

Integer: has a storage space of 4 bytes.

Date: allocated storage space of 8 bytes.

Byte: allocated storage space of 1 byte.

Boolean: the allocated storage depends on the platform of implementation.

Variables belonging to different data types are allocated different amounts of space in the memory. Data types determine the type of data that any variable can store.