Training, Open Source computer languages
PerlPHPPythonMySQLApache / TomcatTclRubyJavaC and C++LinuxCSS 
Search for:
Home Accessibility Courses Diary The Mouth Forum Resources Site Map About Us Contact
 
For 2021 - online Python 3 training - see ((here)).

Our plans were to retire in summer 2020 and see the world, but Coronavirus has lead us into a lot of lockdown programming in Python 3 and PHP 7.
We can now offer tailored online training - small groups, real tutors - works really well for groups of 4 to 14 delegates. Anywhere in the world; course language English.

Please ask about private 'maintenance' training for Python 2, Tcl, Perl, PHP, Lua, etc.
Is Tcl Recursive?

Posted by admin (Graham Ellis), 27 October 2007
I'm posting this up here - a question asked on a Tcl course - is Tcl recursive?  ((Which basically means "can a proc call itself")).  The answer is yes, and here is the classic proof, using recursion to generate  a factorial number

Code:
# Is Tcl Recursive?

# Yes - if you *must*!!

proc factorial this {
       if {$this > 1} {
               return [expr $this * [factorial [expr $this -1]]]
       }
       return 1
       }
# Stack limit between 800 and 1000 levels
puts [factorial 10]




This page is a thread posted to the opentalk forum at www.opentalk.org.uk and archived here for reference. To jump to the archive index please follow this link.

You can Add a comment or ranking to this page

© WELL HOUSE CONSULTANTS LTD., 2022: Well House Manor • 48 Spa Road • Melksham, Wiltshire • United Kingdom • SN12 7NY
PH: 01144 1225 708225 • FAX: 01144 1225 793803 • EMAIL: info@wellho.net • WEB: http://www.wellho.net • SKYPE: wellho