How do I iterate over a std::vector in C++?

How do I iterate over a std::vector in C++?

You can iterate over a std::vector using a for loop, range-based for loop, or iterators. Which method would you like to know more about?

Can you show me an example using a range-based for loop?

Sure! Here's an example:

#include <iostream>
#include <vector>

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

This will print the numbers from the vector.

What if I want to modify the elements while iterating?

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

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

Thanks! Are there any other ways to iterate?

Yes, you can also use iterators. For example:

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