concatenating / f string
https://www.datacamp.com/community/tutorials/f-string-formatting-in-python
list / dictionary
Lists are ordered sets of objects, whereas dictionaries are unordered sets. But the main difference is that items in dictionaries are accessed via keys and not via their position. ... The values of a dictionary can be any Python data type. So dictionaries are unordered key-value-pairs.
print / return
print just shows the human user a string representing what is going on inside the computer. The computer cannot make use of that printing. return is how a function gives back a value. This value is often unseen by the human user, but it can be used by the computer in further functions.'
