Item 2 - range-based for loop (English)

range-based for loop

In C++11, the range-based for loop was introduced, making it more convenient and intuitive to iterate over elements in a container.

Let’s dive straight into the code

#include <iostream>
#include <vector>

int main() {
    // Create a vector of integers
    std::vector<int> numbers = {1, 2, 3, 4, 5};

    // Iterate over the elements in the container using a range-based for loop
    for (auto x : numbers) {
        std::cout << x << " ";
    }
    std::cout << std::endl;

    return 0;
}

Execution Result

Usage:

1. When you need to iterate over all elements in a container (such as a vector, list, map, etc.), the range-based for loop provides a concise and easy-to-understand syntax.
2. When you don’t need the index value or iterator, and only need to access the elements in the container, the range-based for loop is more convenient.

Same functionality, but much more readable! It’s just that simple!