How do I use range-based for loops in C++?

How do I use range-based for loops in C++?

Range-based for loops in C++ allow you to iterate over elements in a container easily. You can use it like this: for (auto& element : container) { /* use element */ }.

Can you give me an example with a vector?

Sure! Here's an example: std::vector<int> vec = {1, 2, 3, 4}; for (auto& num : vec) { std::cout << num << ' '; } This will print the numbers 1 to 4.

What if I want to modify the elements?

You can modify elements by using a reference in the loop. For example: for (auto& num : vec) { num *= 2; } This will double each element in the vector.

Are there any limitations to using range-based for loops?

Yes, range-based for loops cannot be used with certain types of containers that do not support iteration, and you cannot directly access the index of elements.