Page "Unary operation" Paragraph 3

Common notations are prefix notation ( e. g. +, −, not ), postfix notation ( e. g. factorial: n!

), functional notation ( e. g. sin x or sin ( x )), and superscripts ( e. g. transpose A < sup > T </ sup >).

Other notation exists as well, for example in the case of the square root a horizontal bar over the argument extending the square root sign can indicate the extent of the argument.