Skip to main content This browser is no longer supported. Show
Upgrade to Microsoft Edge to take advantage of the latest features, security updates, and technical support.
Function Statement (Visual Basic)
In this articleDeclares
the name, parameters, and code that define a Syntax
Parts
RemarksAll executable code must be inside a procedure. Each procedure, in turn, is declared within a class, a structure, or a module that is referred to as the containing class, structure, or module. To return a value to the calling code, use a Defining a FunctionYou can define a
A If this procedure uses the Returning from a FunctionWhen the To return a value from a function, you can either assign the value to the function name or include it in a The
The following example assigns the return value to the function name
The If you use Calling a FunctionYou call a You call a You can also call a function by using the Visual Basic sometimes
rearranges arithmetic expressions to increase internal efficiency. For that reason, you shouldn't use a Async FunctionsThe Async feature allows you to invoke asynchronous functions without using explicit callbacks or manually splitting your code across multiple functions or lambda expressions. If you mark a function with the
Async modifier, you can use the Await operator in the function. When control reaches an Note An An An A Sub Statement can also be marked with the For more information about Iterator FunctionsAn iterator function performs a custom iteration over a collection, such as a list or array. An iterator function uses the Yield statement to return each element one at a time. When a Yield statement is reached, the current location in code is remembered. Execution is restarted from that location the next time the iterator function is called. You call an iterator from client code by using a For Each…Next statement. The return type of an iterator function can be IEnumerable, IEnumerable<T>, IEnumerator, or IEnumerator<T>. For more information, see Iterators. Example 1The following example uses the
Example 2The following example invokes the function declared in the preceding example.
Example 3In the following example, The
See also
FeedbackSubmit and view feedback for What do you call a function that is used as an argument of another function?Higher Order Functions
Because functions are objects we can pass them as arguments to other functions. Functions that can accept other functions as arguments are also called higher-order functions.
What do you call a statement that runs a function?function call. A statement that executes a function. It consists of the name of the function followed by a list of arguments enclosed in parentheses. function composition. Using the output from one function call as the input to another.
What is a function that takes an argument?A function that takes a single argument as input, such as. , is called a unary function. A function of two or more variables is considered to have a domain consisting of ordered pairs or tuples of argument values. The argument of a circular function is an angle.
When a function is called by its name during the execution of a program it is?global. When a function is called by its name during the execution of a program, then it is. executed.
|