input element and push back code example

Example 1: java vector push_back

// push_back equivalent
ArrayList<int> a = new ArrayList<int>();
a.add(2);             // Add element to the ArrayList.
a.add(4);

// pop_back equivalent.
a.remove(a.size()-1); // Remove the last element from the ArrayList.

Example 2: .push_back function c++

(Things).push_back(Items)