#includeIn the above example, we create a set of integers and initialize it with some values. Then, we use lower_bound function to find the first element that is greater than or equal to 5 which is 6 in this case. Package Library: The lower_bound function belongs to the C++ Standard Template Library (STL) and is defined in the#include int main() { std::set my_set = { 2, 4, 6, 8, 10 }; auto it = my_set.lower_bound(5); std::cout << *it << std::endl; // Output: 6 return 0; }