1) sorting digits in a number returns a new number of ordered digits
{W.sort < 51324}
-> 12345

2) sorting a sequence of numbers returns a new ordered sequence of these numbers
{S.sort < 51 111 33 2 41}
-> 2 33 41 51 111

3) sorting an array of numbers returns the same array ordered
{A.sort! < {A.new 51 111 33 2 41}}
-> [2,33,41,51,111]