XML in a Nutshell, 3rd Edition

Name

concat( )

Synopsis

                     string concat(string s1, string s2)
string concat(string s1, string s2, string s3)
string concat(string s1, string s2, string s3, string s4, ...)

This function concatenates its arguments in order from left to right and returns the combined string. It may take two or more arguments. Nonstrings may be passed to this function as well, in which case they’re converted to strings automatically as if by the string( ) function.