What is foo & bar?

Question

I have seen many example in any tutorial which contains variables/function named foo() and bar(). can anyone tell me what is the background story/tale behind these name?

Answer 1

https://en.m.wikipedia.org/wiki/Foobar

Answer 2

It was a good guess!

Answer 3

Some random names creates by the first programmers then it got stuck.
Like spam and eggs

Answer 4

Well mine is way off, as a coding convention but well, it's logical 😶