Each variable named in the list names, is given the corresponding value in the list values. If there are more names than values, the extra names are assigned the value of an empty string. The command is an efficient and understandable alternative to scanning a list repeatedly using lindex to parse its elements. For example:
lset "green black pink" "foreground background highlight" puts "the background color is $background"
The command is a functional subset of the rset command. The latter command is able to recurse nested lists, and parse arbitrarily complex data structures.