I’ve added a bit of my own flare to it which might make it easier to read to some, So include iostream is including a library of functions from my understanding, Int main means it needs to return a value at the end , system("CLS) which I have added is from the stdh.lib library which is also included inside IO stream I believe which is why I can use it, Then we have the std::cout which prints all strings and variables and const int to declare the variable as a constant integer which the value cannot be changed, and finally return 0 which is sent back to main meaning the program has finished.
TBH I think some of my understanding might be a bit off and if anyone sees that I have gotten a detention wrong please let me know as I would like to improve my communication skills as well.