Defined in header <wchar.h>
Defined in header <wctype.h>
Defined in header <math.h>
Defined in header <complex.h>
Defined in header <<fenv.h>>
Queries the alignment requirement of its operand type. Syntax
If the macro constant __STDC_NO_THREADS__(C11) is defined by the compiler, the header <threads.h>
Mathematical functions
Defined in header <string.h>
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