Defined in header <wctype.h>

Defined in header <math.h>

Defined in header <wctype.h>

Defined in header <wctype.h>

Defined in header <complex.h>

Mathematical functions

Usage do-while loop:

Defined in header <<fenv.h>>

Comments serve as a sort of in-code documentation. When inserted into a program, they are effectively ignored by the compiler; they are solely intended to be used as notes

Defined in header <complex.h>