---
title: 6.7 void Functions
description: "A `void` function is a function that does not return a value to its caller. The `void` keyword is specified as the function's return type to indicate that the function performs an operation without producing a return value. A `void`…"
url: "https://edcret.in/docs/cpp-programming/functions/6-7-void-functions/"
updated: "2026-09-06"
category: C++ Programming / Functions
---

# 6.7 void Functions

A `void` function is a function that does not return a value to its caller. The `void` keyword is specified as the function's return type to indicate that the function performs an operation without producing a return value.

A `void` function can still accept parameters and perform calculations or other operations. When execution reaches the end of the function body, control returns to the calling code.

## Source Code

```
#include <iostream>

void displayMessage()
{
    std::cout << "Welcome to C++.\n";
}

int main()
{
    displayMessage();

    return 0;
}
```

## Output

```
Welcome to C++.
```

## Explanation

- `void displayMessage()` defines a function named `displayMessage` with no return value.
- `void` specifies that the function does not return a value to its caller.
- `displayMessage();` calls the function from `main()`.
- The statement inside the function body executes when the function is called.
- A `void` function does not require a `return` statement to return a value.
- A `return;` statement without a value can still be used in a `void` function to terminate the function early.
- After reaching the end of the function body, control returns to the statement following the function call.
- `return 0;` terminates the program successfully.