Defined in header <stdlib.h>

Defined in header <stdlib.h>

An object whose identifier is declared with the storage-class specifier _Thread_local (since C11) has thread storage

A union is a type consisting of a sequence of members whose storage overlaps (as opposed to struct, which is a type consisting of a sequence of members whose storage is allocated

Defined in header <stdlib.h>

Defined in header <stdio.h>

Defined in header <stdlib.h>

Defined in header <uchar.h>

Executes a loop. Used as a shorter equivalent of while

Defined in header <stdlib.h>