It means that if you want to explain code to other coder you can easily do that by making flowcharts . Flow charts are language Independent it means you have wrote a code in any language so if you show it to other person . Then he can understand that easily because for all languages components use in Flow Charts are same.

TERMINATOR - This Component is used for start or end . when you show the start of the code or the end you use this shape for that .
ARROW - This Component is used to show the flow of our program .
INPUT / OUTPUT - This Component is used when you input something means when program is asked you to enter something or for output means program is giving something. For that you use that parallelogram shape.
PROCESS - For process we use rectangle shape.It is used when their is some process in your program & you want to show that. So you will use that shape.
DECISION - For Decision we use a rhombus shape . It is use when their is a Condition in your Program means condition like for example " If it is raining outside take Umbrella if not don't take it " like hat . In this type of Scenario you can take Decision.
Now you can see that I have taken A storage for 20 & B for 25. My Output will store in SUM storage as you can see in this picture.
If you want to Watch this stuff Explaining me in a Video Format . Video is Below