Void? Help me!!!!!

I've been making lots of progress in C++ in the last couple of days.

But when I got to the part on the tutorial about switch case, it introduced the word "void"
Because there is no explanation, I don't get it.
Will somebody please help?
Cprogramming.com Tutorial: Switch-case structure

Code:

using namespace std;

void playgame();
void loadgame();
void playmultiplayer();
	
int main()

Thanks a bunch

void used as a return type basically means that a function will not return anything. In this snippet, it simply means that those 3 functions aren't returning anything.

what do you mean by not returning anything?

Not returning anything means that the function ends without returning a value to the function that called it. Take this for example

Code:

int Foo(int bar)
{
    return n + 5;
}

Here we said Foo is a function that takes an integer and returns an integer. Now lets say we want to write a function to print something to the screen. We don't need the function to return a value like the previous function did. All it needs to do is print a message so you would write

Code:

void Print()
{
    cout << "This is a message.";
}

Now we have the function print. It doesn't take in any parameters and it doesn't return anything after it is called. You do not need a return statement because execution ends at the end of the function because it is void. You can add a return statement but it is not really necessary.

Code:

void Print()
{
    cout << "This is a message.";
    return;
}

The previous lesson on functions does make some comments about void functions.