Learn basics of python and cpp

at the top of desktop you will see the text (written in red and white color) like
iostream
using namespace std;

this simple header of your program, this are build in function

what is c plus plus(++)
"C++ is a statically-typed, free-form, (usually) compiled, multi-paradigm, intermediate-level general-purpose middle-level programming language It was developed by Bjarne Stroustrup in 1979"