How do I iterate over lists in C++?

How do I iterate over lists in C++?

In C++, you can iterate over lists using a for loop, range-based for loop, or iterators. Which method would you like to know more about?

Can you explain the range-based for loop?

Sure! A range-based for loop allows you to iterate through each element in a list easily. Here's an example:

#include <iostream>
#include <list>

int main() {
    std::list<int> myList = {1, 2, 3, 4, 5};
    for (int num : myList) {
        std::cout << num << " ";
    }
    return 0;
}

This will print each number in the list.

What if I want to modify the elements while iterating?

If you want to modify elements, you can use a reference in the range-based for loop like this:

for (int &num : myList) {
    num *= 2; // This will double each element
}

This way, you can change the original elements in the list.

Are there any other methods to iterate over lists?

Yes, you can also use iterators. Here's an example:

for (auto it = myList.begin(); it != myList.end(); ++it) {
    std::cout << *it << " ";
}

This gives you more control over the iteration process.