Vb.net console program examples

Net, we use classes to define a blueprint for a Data Type. It does not mean that a class definition is a data definition, but it describes what an object of that class will be made of and the operations that we can perform on such an object. An object is an instance of a class. The class members are the methods and variables defined within the class. To define a class, we use the Class keyword, which should be followed by the name of the class, the class body, and the End Class statement.

This is described in the following syntax:. Step 3 Run the code by clicking the Start button from the toolbar. You should get the following window:. A structure is a user-defined data type.

Structures provide us with a way of packaging data of different types together. A structure is declared using the structure keyword. It is where we write our code. Net programming. If the user types John, it will be immediately be converted to john before the evaluation of the Case statements is done. Skip to content. What is Select Case in VB. For the case of multiple clauses, separate them using a comma ,.

Net: Step 1 First, create a new console application. You Might Like: VB. Net Programming VB. Report a Bug.

Previous Prev. Next Continue. Home Testing Expand child menu Expand. SAP Expand child menu Expand. There's also live online events, interactive content, certification prep materials, and more. Kernighan and Dennis M. Ritchie, The C Programming Language. It has become a tradition for programming books to begin with a hello, world example.

The idea is that entering and running a program—any program—may be the biggest hurdle faced by experienced programmers approaching a new platform or language. Without overcoming this hurdle, nothing else can follow. This chapter contains three such examples: one that creates a console application, one that creates a GUI application, and one that creates a browser-based application.

Each example stands alone and can be run as is. NET has a command-line compiler! This version of hello, world is a console application -- it displays its output in a Windows command-prompt window. The command vbc invokes the Visual Basic.

NET command-line compiler, which ships with the. Compiling Hello. After compiling, type Hello at the command line to run your program. Figure shows the results of compiling and running this program. Types are grouped into namespaces to help avoid name collisions and to group related types together.

Specifically, the hello, world program uses the Console class, which is defined in the System namespace. The Imports statement is merely a convenience. It is not needed if the developer is willing to qualify type names with their namespace names.

For example, the hello, world program could have been written this way:. However, it is customary to use the Imports statement to reduce keystrokes and visual clutter. An important namespace for Visual Basic developers is Microsoft. For example, the Visual Basic Trim function is a member of the Microsoft.

Strings class, while the MsgBox function is a member of the Microsoft. Interaction class. Much of the functionality available in this namespace, however, is also duplicated within the. Developers who are not familiar with Visual Basic 6 will likely choose to ignore this namespace, favoring the functionality provided by the.

NET Framework. NET Framework is introduced later in this chapter and is explained in detail in Chapter 3. This line begins the declaration of a standard module named Hello. The standard-module declaration ends with this line:.

In Visual Basic 6, various program objects were defined by placing source code in files having various filename extensions. For example, code that defined classes was placed in. In Visual Basic. NET, all source files have. For example, classes are defined with the Class End Class construct, and standard modules are defined with the Module End Module construct.

Any particular. The purpose of standard modules in Visual Basic 6 was to hold code that was outside of any class definition. For example, global constants, global variables, and procedure libraries were often placed in standard modules. Standard modules in Visual Basic. NET serve a similar purpose and can be used in much the same way.