Provided by: tcl8.5-doc_8.5.19-4_all 
NAME
join - Create a string by joining together list elements
SYNOPSIS
join list ?joinString? ________________________________________________________________________________________________________________
DESCRIPTION
The list argument must be a valid Tcl list. This command returns the string formed by joining all of the
elements of list together with joinString separating each adjacent pair of elements. The joinString
argument defaults to a space character.
EXAMPLES
Making a comma-separated list:
set data {1 2 3 4 5}
join $data ", "
→ 1, 2, 3, 4, 5
Using join to flatten a list by a single level:
set data {1 {2 3} 4 {5 {6 7} 8}}
join $data
→ 1 2 3 4 5 {6 7} 8
SEE ALSO
list(3tcl), lappend(3tcl), split(3tcl)
KEYWORDS
element, join, list, separator