[davnicwil]

I don't know, but I also don't care much because it doesn't matter.

Again, can they quickly understand and apply the knowledge once it is explained to them is all that matters.

[balfirevic]

It also matter that they apparently wrote a for loop a number of times without wondering what each of those symbols actually does and just treated it as magic incantation.

Edit: assuming they didn't use a language where such idiom doesn't exist or is not common, as another commented pointed out.