size_t is all about

[marhuum]

What exactly is size_t all about compare to int, and what's their differences?

[keskiverto]

https://en.cppreference.com/w/cpp/types/size_t

[malibor]

std::size_t is just a fancy way of writing and explicitly telling that you are dealing with memory size of something, ie. array

otherwise it's the same thing as unsigned long, but the actual variable size is implementation defined.

it's different in differenct compilers like, msvc, gcc, llvm....