Vb what is a method

A method is just a block of code that you can call, and huge programs have methods. You will see how we can use methods in later programs we create.

You have already used methods before, like WriteLine ; some methods allow you to pass data, as you will see later in this tutorial. If you run this F5 you will see a black console window appear and it will close quickly. Here's, the textbox is being checked first.

If the user has left it blank then we bail out. First, we type the name of the variable we want to store the result of our Method into. In our case, the one called NewCode. After the equals sign, we type the name of our Object variable:. As soon as you type a full stop after your Object variable, you should see a popup box with the name of your new method on the list:. You can tell it's a Method because of the purple block next to it. But notice the tool tip - it's the first line from our Function!

In between the round brackets, VB is telling us what type of data needs to be passed over to the Method - a String of text. The second "As String" tells you that the Method returns a value that needs to be stored somewhere. So if you've set up a Method that returns a value a Function then you need to store it in a variable. To get at the Method inside of your class, first type the name of your Object variable. The type a full stop. Look for the name of your Method in the pop up list that appears.

Signatures enable the overloading mechanism of members in classes, structs, and interfaces. A method signature consists of the name of the method and the type and kind, such as value or reference. A method signature does not include the return type, nor does it include the params modifier that may be specified for the last parameter.

A constructor signature consists of the type and kind, such as value or reference. A constructor signature does not include the params modifier that may be specified for the last parameter. An indexer signature consists of the type. An indexer signature does not include the element type. A typical example of classes that can be used without explicit instances is the Math class.

To calculate the logarithm of a number, you can use an expression such as this one:. Methods that must be applied to an instance of the class are called instance methods. By default, all methods are instance methods. To create a shared method, you must prefix the corresponding function declaration with the Shared keyword, just like a shared property. Why do we need shared methods, and when should we create them? The DaysInMonth method returns the number of days in the month of a specific year that is passed to the method as an argument.

Think of the DaysInMonth method this way: Do I need to create a new date to find out if a specific month has 30 or 31 days? If the answer is no, then the method is a candidate for a shared implementation. The AddDays method, on the other hand, is an instance method.

We have a date to which we want to add a number of days and construct a new date. In this case, it makes sense to apply the method to an instance of the class — the instance that represents the date to which we add the number of days. The idea behind classes, however, is to combine data with code. If you implement a class with shared members, you lose one of the major advantages of OOP.