An object has a storage duration that determines its lifetime. There are three storage durations: static, automatic, and allocated.
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According to \[[ISO/IEC 9899-1999|AA. C References#ISO/IEC 9899-1999]\]: |
The lifetime of an object is the portion of program execution during which storage is guaranteed to be reserved for it. An object exists, has a constant address, and retains
its last-stored value throughout its lifetime. If an object is referred to outside of its lifetime, the behavior is undefined. The value of a pointer becomes indeterminate when
the object it points to reaches the end of its lifetime.
Non-Compliant Code Example
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