What are namespaces in C++?

What are namespaces in C++?

Namespaces in C++ are used to organize code and prevent name conflicts. They allow you to group related functions, classes, and variables.

Can you give me an example of how to use a namespace?

Sure! Here's a simple example:

namespace MyNamespace {
    void myFunction() {
        // function code
    }
}

int main() {
    MyNamespace::myFunction(); // calling the function from the namespace
}

What happens if I don't use namespaces?

Without namespaces, you might encounter name collisions if two different parts of your code define the same name for a function or variable.

Are there any built-in namespaces in C++?

Yes, C++ has several built-in namespaces, such as std, which contains the standard library functions and classes.