Page 84 - TCS ICT Book 8

The City School 2021-2022

Declaring a Private Variable

It is used to accept textual input from the user. The user can add strings, numerical

values and a combination of those.

In visual studio, we can declare the variable by the keyword Dim which is a short form

for dimension. For better understanding, we will create a program using 2 variables
and calculate them to see its working. Follow these steps to create a program with

variables in it:

1. Create a new form and name that form as
Variables.

2. Add 2 text fields from the toolbox in the
form.

3. Add 1 button from the toolbox in the form
and change the text property of the button

to Add from properties panel.
4. Add 1 label from the toolbox in the form

and change the text property of the label to
Result from the properties panel

5. Double click on the Add button and enter
this code as shown in the example below.

Click on the debug button or F5 to execute
the program in debugging mode.

6. The = here is an assignment operator, a
symbol used to assign the value on the How Does it Work?

right of the sign to the variable on the left. • The 1st and the 2nd line of code are
where we have declared the variables
So here, the content of TextBox1 is stored in with its data type which is an integer in

variable number1. this case.
• In the 3rd and 4th lines, we have
7. Note here that although whatever you write declared the value of a variable. In this

in a text box is considered as String. Visual case, we are taking the user input from
the textbox.
Basic automatically converts it to a number
• In the 5th line, our code adds the two
since the variable number1 is declared as variables and puts the sum as text into
Integer. Label1.

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