Why is "std::" used before standard library objects and methods?

Whenever I see someone elses C++ they always include std::

std::vector  std::reduce  std::map  

I was just wondering why because the code works fine without it and makes code look more verbose

https://stackoverflow.com/questions/66094742/why-is-std-used-before-standard-library-objects-and-methods February 08, 2021 at 09:07AM