How To Call A Void Function In C++?

How to Call a Void Function in C++

Functions are an essential part of any programming language, and they’re used to group together related code so that it can be reused. In C++, functions can be declared with or without a return value. A void function is a function that does not return a value.

Calling a void function is simple. You simply need to provide the function name and any required arguments. For example, the following code calls the `print()` function, which prints the string “Hello, world!” to the console:

c++
print(“Hello, world!”);

In this article, we’ll take a closer look at void functions in C++. We’ll discuss how to declare and call void functions, and we’ll explore some of the benefits of using void functions in your code.

Sr. No. Column 1 Column 2
1 How to call a void function in C++? To call a void function in C++, you can use the following syntax:
2 Syntax function_name();
3 Example c++
include

using namespace std;

int main() {
// Define a void function called printHelloWorld().
void printHelloWorld() {
cout << "Hello, World!" << endl; } // Call the printHelloWorld() function. printHelloWorld(); return 0; }

In C++, a void function is a function that does not return any value. It is used to perform a specific task and does not need to return any information to the calling function.

Void functions are declared in the same way as other functions, but the return type is specified as `void`. For example, the following is a declaration of a void function called `print()`:

c++
void print() {
// do something
}

To call a void function, you simply need to write the function name followed by the parentheses. For example, the following code calls the `print()` function:

c++
print();

What is a void function?

A void function is a function that does not return any value. It is used to perform a specific task and does not need to return any information to the calling function.

Void functions are declared in the same way as other functions, but the return type is specified as `void`. For example, the following is a declaration of a void function called `print()`:

c++
void print() {
// do something
}

To call a void function, you simply need to write the function name followed by the parentheses. For example, the following code calls the `print()` function:

c++
print();

How to call a void function?

To call a void function, you simply need to write the function name followed by the parentheses. For example, the following code calls the `print()` function:

c++
print();

You can also pass arguments to a void function. For example, the following code calls the `print()` function with the argument `”Hello, world!”`:

c++
print(“Hello, world!”);

When you call a void function, the function will execute its body and then return to the calling function. The calling function does not receive any value from the void function.

Example of a void function

The following code is an example of a void function:

c++
void print() {
std::cout << "Hello, world!" << std::endl; } This function prints the message "Hello, world!" to the console. In this tutorial, you learned what a void function is and how to call a void function in C++. Void functions are useful for performing tasks that do not need to return any value.

How to Call a Void Function in C++?

A void function is a function that does not return a value. This means that when you call a void function, you do not need to provide a value to store the return value.

To call a void function, you simply use the function name followed by the parentheses. For example, the following code calls the `print()` function:

c++
print();

The `print()` function does not return a value, so you do not need to provide a value to store the return value.

Passing Arguments to a Void Function

You can pass arguments to a void function just like you would pass arguments to any other function. The arguments are placed inside the parentheses, separated by commas. For example, the following code calls the `print()` function with the argument `”Hello World!”`:

c++
print(“Hello World!”);

When you pass arguments to a void function, the arguments are used by the function to perform its operations. In the case of the `print()` function, the argument is used to specify the text that is printed to the console.

Returning Values from a Void Function

Although void functions do not return any values, you can still use them to return values indirectly. For example, you could use a void function to set a variable to a specific value, or to print a message to the console.

The following code shows how to use a void function to set a variable to a specific value:

c++
void set_value(int value) {
// Set the value of the variable.
value = 10;
}

int main() {
// Create a variable.
int value = 0;

// Call the function to set the value of the variable.
set_value(value);

// Print the value of the variable.
std::cout << value << std::endl; return 0; } The `set_value()` function does not return a value, but it does set the value of the `value` variable to 10. The `main()` function then prints the value of the `value` variable to the console. Void functions are a useful tool for performing operations that do not require a return value. You can pass arguments to void functions and use them to return values indirectly.

How do I call a void function in C++?

To call a void function in C++, you use the following syntax:

function_name();

For example, to call the `print()` function, you would use the following code:

print();

What is the difference between a void function and a non-void function?

A void function does not return a value, while a non-void function returns a value. For example, the `print()` function is a void function because it does not return a value. The `get_int()` function is a non-void function because it returns an integer value.

Can I pass arguments to a void function?

Yes, you can pass arguments to a void function. When you pass arguments to a void function, the arguments are used by the function, but the function does not return a value. For example, the following code passes the integer value 10 to the `print()` function:

print(10);

What is the purpose of a void function?

Void functions are used to perform tasks that do not require a return value. For example, the `print()` function is used to print a message to the console. The `get_int()` function is used to get an integer value from the user.

Can I call a void function from a different source file?

Yes, you can call a void function from a different source file. To do this, you must include the header file that contains the declaration of the function. For example, if you want to call the `print()` function from a different source file, you would need to include the `` header file.

What are some common mistakes people make when calling void functions?

Some common mistakes people make when calling void functions include:

  • Forgetting to include the header file that contains the declaration of the function.
  • Forgetting to put parentheses after the function name.
  • Passing the wrong number of arguments to the function.
  • Passing the wrong type of arguments to the function.

How can I avoid making mistakes when calling void functions?

To avoid making mistakes when calling void functions, you should:

  • Always include the header file that contains the declaration of the function.
  • Always put parentheses after the function name.
  • Make sure you are passing the correct number of arguments to the function.
  • Make sure you are passing the correct type of arguments to the function.

Additional resources

  • [C++ Tutorial: Void Functions](https://www.tutorialspoint.com/cplusplus/cpp_void_functions.htm)
  • [C++ Reference: Void Functions](https://en.cppreference.com/w/cpp/language/functionVoid_functions)
  • [Stack Overflow: How to call a void function in C++?](https://stackoverflow.com/questions/1215625/how-to-call-a-void-function-in-c)

    In this blog post, we have discussed how to call a void function in C++. We have covered the following topics:

  • The syntax of calling a void function
  • The different ways to call a void function
  • The advantages and disadvantages of calling a void function

We hope that this blog post has been helpful in understanding how to call a void function in C++. Please feel free to leave any comments or questions below.

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