How to do something

Optional notes or general comments on the following code.

code part1 part2 part3 ...

Example (optional, use this to demonstrate input/output examples of code solution)

echo 'ok'; // first code block is usage example

ok # second code block is output example, no separators between them

group: name_of_the_group_of_similar_code_solutions (optional, used to group related solutions)