2.4 Talking to humans (and other intelligent beings)

Often in programming you are doing something complicated and may not in the future remember what you did. When this happens the program should probably be commented. A comment is a note to you and other programmers explaining what is happening. For example:

#Not quite PI, but an incredible simulation
print 22.0/7.0
Notice that the comment starts with a #. Comments are used to communicate with others who read the program and your future self to make clear what is complicated.