what does #include <cmath> mean?

Answer 1

it includes the cmath library in your program

Answer 2

List of cmath functions
http://www.cplusplus.com/reference/cmath/

Answer 3

include the header "cmath" so making able to use all the functions of cmath(see Jetset Willy's post)

Answer 4

It is a library file containing files regarding maths

Answer 5

# is a preprocessor that includes cmath library means all the definitions regarding math library are included in it and can be used readily.
In short "#include<cmath>" means before proceeding to programme once look at these library.

Answer 6

this is predifiend heder file for math Calculetion

Answer 7

it helps to making programs very short