Description: Join lists together.
Syntax: concat ?arg arg ...?
Argument: lists, elements, data,
Returns: string containing list of arguments separated by spaces
See Also: lappend, list, append
Examples:
concat a b {c d e}
{f {g h}}
The Concat command concatenates the arguments into a single list. It also eliminates leading and trailing spaces in the arg’s and adds a single separator space between arg’s. If no args are supplied, the result is an empty string.