C++:What is the difference between "unsigned int i" and "int i" ?

unsigned means it cannot be a negative number . int, can be negative or positive number.

bahha is right and what’s more the range is different，too int :-2^31 ~ 2^31 unsigned int:0~2^32

Celestino🇰🇪🇫🇷 What do you mean by "sure??"? https://stackoverflow.com/questions/9045436/the-real-difference-between-int-and-unsigned-int

A-Z