An automatic variable (which may be defined in the C programming language using the "auto" keyword)

Because the array is declared as an automatic variable, its lifetime ends when the function returns.

The existing distinction between the stack and the heap, the rules governing automatic and static variables, and so on are all still in full effect.

Local automatic variables are uninitialized, i.e. contain "trash" values.

In most languages, local variables are automatic variables stored on the call stack directly.

To create lexical variables, which are more like the automatic variables discussed above, use the operator instead.

An automatic variable is simply declared with its class name, and storage is allocated on the stack when the value is assigned.

An uninitialized automatic variable has an undefined value until it is assigned a valid value of its type.

In C++, the constructor of automatic variables is called when the execution reaches the place of declaration.

If the object was created as an automatic variable, its destructor is automatically called when it goes out of scope.