Description

which of the following is a predefined procedure that returns a value ?

# What is a Predefined Procedure That Returns a Value?

When working with programming, understanding the difference between procedures and functions is fundamental. These two concepts play distinct roles in executing code, and knowing their characteristics can significantly enhance your coding proficiency.

## Understanding Functions and Procedures

**Functions:**
A function is characterized by several key attributes:
1. **Inputs:** Functions accept data as inputs.
2. **Processing:** Functions process the input data.
3. **Outputs:** Functions return a single output or a set of results.

In summary, a function is a predefined procedure that returns a value or series of values and is used to perform a single but related action.

### Definitions and Examples

– **Definition:** A function is a predefined procedure that performs a specific task and then returns a value.
– **Example:** In algebra, if ( f(x) = 2x + 5 ), then ( f(1) = 7 ), ( f(2) = 9 ), and ( f(3) = 11 ). Here, 1, 2, and 3 are arguments, and 7, 9, and 11 are the corresponding values.

**Procedures:**
Aprocedure (or subroutine) is a block of code that performs a specific task, but unlike functions, procedures do not return values.

## Calling a Function in Visual Basic
In Visual Basic, to call a function that returns a value, you follow these steps:
1. Use the function name after the equal sign in an assignment statement.
2. Enclose the argument list in parentheses.

Even if there are no arguments, using parentheses makes your code more readable.

## Comparing Procedures and Functions

**Functions vs. Procedures:**
– **Functions:** Return a value after execution.
– **Procedures:** Do not return a value; they perform actions.

**Similarities:**
– Both functions and procedures can receive input values.
– Both achieve a specific task.

Understanding these distinctions is crucial for writing efficient and effective code.

## Practical Examples

Here’s a concise example to illustrate the difference:

– **Procedure Example (Visual Basic):**
“`vb
Sub DisplayMessage()
MsgBox(“This is a procedure that performs a task.”)
End Sub
“`

– **Function Example (Visual Basic):**
“`vb
Function AddNumbers(a As Integer, b As Integer) As Integer
Return a + b
End Function
“`

In this function example, `AddNumbers` accepts two integers, adds them, and returns the result.

## Conclusion

To summarize, a **function** is a predefined procedure that returns a value, making it essential for operations requiring output. Functions are integral to many programming tasks, offering a structured way to handle complex logic and streamline code. Whether you are working with Visual Basic, Python, or any other programming language, understanding functions will significantly enhance your coding efficiency.

For further exploration, you can visit [brainly.com](https://brainly.com) or [Microsoft Documentation](https://learn.microsoft.com). Additionally, educational resources like [Quizlet](https://quizlet.com) offer interactive flashcards and quizzes that can help solidify your understanding.

Happy coding!