How does a C++ function return void type?

The void function in C does not return any value, and its syntax is void function_name(). Common uses include: Entering user input, such as getting the user's age and printing it to the console.

The return type of void function in C

In C, thevoidtype is a special The return type means that the function does not return any value. This is different from other functions, which usually return a specific type of value, such as an integer, string, or object.

The syntax of the void function is as follows:

void function_name();

The following is an example of a simple function that returns thevoidtype:

void print_hello() { std::cout << "Hello, world!" << std::endl; }

You can use it by calling the function void function:

print_hello();

Calling a void function does not generate any return value, so you cannot assign the return value to a variable or use it as input to another expression.

Practical case: Entering the user’s age

A common use of the void function is to enter user input. Here is an example of a C program that uses thevoidfunction to get the age from the user and print it to the console:

#include  void get_age() { int age; std::cout << "Enter your age: "; std::cin >> age; std::cout << "Your age is: " << age << std::endl; } int main() { get_age(); return 0; }

In the above example,get_age()The function usesvoidas the return type since it does not return any value.get_age()The function reads the age from the user and prints it to the console.main()The function calls theget_age()function to allow the user to enter their age and print it to the console.

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