h3. 2. range-based for loops
In $C++11$, you can iterate over each element in a list with less code:

== code(cpp) |
int array[5] = {1, 2, 3, 4, 5};
for (int x: array) {

==
If you want to modify the elements in the list, you need to get a reference to the element like this:

== code(cpp) |
double array[5] = {1.5, 2.7, 3.9};
for (auto &x: array) {

}
==

Note: This code compiles without using $&$, but the original array is not modified unless a reference is used.