Check out example codes for "How to get the last element of an array in C++ using std::array". It will help you in understanding the concepts better.

Code Example 1

a = [1,2,3,4,5,6,7]
int x = a.size()
// last element of list 
a[x-1] // ourput -> 7

Code Example 2

#include <array>
std::array<int, 5> a {1, 2, 3, 4, 5};
int i = a[a.size() - 1]; // The last variable stored in i

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