What Is Use of Void Data Type?


Angela Bailey

The use of the void data type in programming languages serves an important purpose. It allows us to define functions that do not return a value. In this article, we will explore the use cases and benefits of using void as a data type.

Defining Void Functions

In many programming languages, a function is used to perform a specific task and can return a value. However, there are scenarios where we may not need or want to return a value from a function. In such cases, we use the void data type to indicate that the function does not return anything.

To define a void function, we simply specify the return type as void in the function declaration. Here’s an example:

void printMessage() {
    // Function code goes here

Benefits of Using Void Functions

The use of void functions offers several benefits:

  • Simplicity: Void functions allow us to write code that focuses solely on performing tasks without worrying about returning values. This simplifies the code and makes it more readable.
  • Code Organization: By using void functions, we can modularize our code and divide it into smaller, manageable units.

    This helps improve code organization and maintainability.

  • Economy of Memory: Since void functions do not return any value, they do not consume memory for storing return values. This can be advantageous when dealing with large-scale applications.

Void Pointers

In addition to using void as a return type for functions, some programming languages also support void pointers. A void pointer is a special type of pointer that can point to objects of any type. It is often used in scenarios where the exact type of the data being pointed to is unknown or can vary.

Here’s an example of using a void pointer:

void* genericPointer;
int x = 10;
genericPointer = &x;

In the example above, the void pointer genericPointer is assigned the address of an integer variable x. Since a void pointer can point to any data type, it allows for flexibility in handling different types of data within a program.


The use of the void data type and void functions is essential in programming. They allow us to define functions that do not return values, simplifying our code and improving its organization. Additionally, void pointers provide flexibility in handling different data types within a program.

By understanding and utilizing the void data type effectively, developers can write cleaner and more efficient code.

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