They do discuss it though at the end of the article https://en.wikipedia.org/wiki/Binary_search_algorithm#Implementation_issues https://en.wikipedia.org/wiki/B

They do discuss it though at the end of the article https://en.wikipedia.org/wiki/Binary_search_algorithm#Implementation_issues https://en.wikipedia.org/wiki/Binary_search_algorithm#Implem... And as other mentionned, this is pseudo code and not implementation. But if you think it's incorrect, feel free to correct it.