I encounter the font used for add-edge many times among documents generated from LaTeX, e.g. beamer presentations. But I have no idea how can I use this font in my own document written from scratch. How can I include this font into my document?
FYI the source of the algorithm is here.

\textsf{add-edge}? The document uses CM and that looks a lot like CM's sans serif version. – Ralf Stubner Nov 29 '19 at 09:35