Does Tcl have an equivalent of PERL and Ruby backtic

Question

In Ruby/PERL, I can very easily get the console output of a system command fed into a file. For example:

$k = `ls`

Would input the output of ls into variable $k in PERL (and Ruby).
How can one do something like this in Tcl?
Thanks

Answer 1

Use exec command to get the same.

set output [ exec ls ]
puts $output

Man page : exec