$ perl -e 'print join(", ",qw(1 3 6 2));'
1, 3, 6, 2

##</code><code>##

[jeroen@rulffk]  perl -e 'print join(", ",(1 3 6 2));'
Number found where operator expected at -e line 1, near "1 3"
	(Missing operator before  3?)
syntax error at -e line 1, near "1 3"
Number found where operator expected at -e line 1, near "3 6"
	(Missing operator before  6?)
Number found where operator expected at -e line 1, near "6 2"
	(Missing operator before  2?)
Execution of -e aborted due to compilation errors.