foo and bar are the Lorem Ipsum of code. They let you look at the flow without getting caught up in certain details. You look at 'for', 'while', 'if', and oth

foo and bar are the Lorem Ipsum of code. They let you look at the flow without getting caught up in certain details. You look at 'for', 'while', 'if', and other operators more closely when the identifiers are place-holders.