Variables are like containers which holds the data values. A variable specifies the name of the memory location. 

## How to declare variables

```vb
Dim VariableName As Datatype 'variable Declaration
VariableName = value 'Variable Initialization
```

## Naming convention of variables

* Variable names can have only letters (both uppercase and lowercase letters), digits and underscore(`_`).
* Variables naming cannot contain white spaces like `first name` which is a invalid variable name.
* First letter of a variable should be either a letter or an underscore(`_`).
* It is always advisable to give some meaningful names to variables.

## Example

### Declaring integer variable and assigning value
```c#
Dim val As Integer
val = 100
```
### Declaring decimal variable and assigning value
```c#
Dim val As Decimal
val = 57.93
```

### Declaring String variable and assigning value
```c#
Dim str As String
str = "OneCompiler"
```
### Declaring Boolean variable and assigning value
```c#
Dim isValid As String
isValid = true
```


Introduction to VB.net

Data Types

Variables

Constants

Operators

Basics

Conditional Statements

Loops

Control Statements

Strings

Arrays

Procedures

Classes and Objects

Object-Oriented Programming