Algorithm2e is an environment for writing algorithms. An algorithm is defined as a floating object like figures. It provides macros that allow you to create different keywords, thus a set of predefined key word is given. You can also change the typography of the keywords. The environment allows you to have vertical lines delimiting block of instructions. It defines also different sort of algorithms such as Procedure or Function allowing name of this functions to +be reused in common text or other algorithms. The author is Christophe Fiorio.