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► KB ► To/From Guides ► VB.Net

Variables (VB.Net and JavaScript Cross Reference Guide)

By Mike Prestwood

VB.Net versus JavaScript: A side by side comparison between VB.Net and JavaScript.

Language Basics

Language basics is kind of a catch all for absolute beginner stuff. The items (common names) I chose for language basics is a bit random and include items like case sensitivity, commenting, declaring variables, etc.

Variables

[Other Languages]

Languages Focus

A variable holds a value that you can use and change throughout your code so long as the variable is within scope. With variable declaration, you not only want to know the syntax of how you declare a variable but you also want to know where. Are you allowed to declare a variable inline? What are the available scopes: local vs. global. Can you assign a value at the same time you declare a variable?

VB.Net: Dim x As Integer=0

Variables are case sensitive but VS.Net will auto-fix your variable names to the defined case. You can declare variables in-line wherever you need them and declarative variable assignment is supported.

Syntax Example: 1 certification question.

Dim FullName As String
Dim Age As Integer
Dim Weight As Double
FullName = "Mike Prestwood"
Age = 32
Weight = 154.4
'Declaritive variable assignment: 
Dim Married As String = "Y"
MsgBox(Married)

JavaScript: var x = 0;

JavaScript is a loosely typed language. Each variable is cast in usage as string, number, boolean, function, or object.

Variable names are case sensitive.

Alternatively, you can specify the value when you declare a variable:

var FirstName = "Mike";

var LastName = "Prestwood";

var Age = 42;

Syntax Example:

var FirstName;

var LastName;

var Age;