C + + Auto

Auto is used to declare automatic variables. It is a storage type identifier that indicates that the variable (auto) has a local scope. A block-scoped variable declaration, such as a variable declaration in the For loop body, defaults to the auto storage type.

Benefit: The auto variable is automatically freed when it is out of scope, and there is no memory overflow condition (except for classes that contain pointers), which is more secure.

Example: for (Auto it = Dict.begin (); It!=dict.end (); it++)//dict to vector type

C + + Auto