For Powershell Users

Recursion

Powershell

function Invoke-Factorial {
    param (
        [int]$n
    )

    if ($n -le 1) {
        return 1
    } else {
        $prev = Invoke-Factorial ($n - 1)
        return ($n * $prev)
    }
}

# Example usage
Write-Output (Invoke-Factorial 5)  # Output: 120

TCL

proc factorial {n} {
    if {$n <= 1} {
        return 1
    } else {
        set prev [factorial [expr {$n - 1}]]
        return [expr {$n * $prev}]
    }
}

puts [factorial 5]  ;# Output: 120

FAQs

https://www.tutorialspoint.com/tcl-tk/tcl_packages.htm

https://tcl.tk/man/tcl8.5/tutorial/Tcl31.html

https://www3.rocketsoftware.com/rocketd3/support/documentation/d3nt/91/refman/tcl/tcl_commands.htm

https://wiki.tcl-lang.org/page/What+is+Tcl

https://www.magicsplat.com/articles/oo.html

https://github.com/tcltk/tcloo

https://www.slideshare.net/activestate/tcl-86features

https://wiki.tcl-lang.org/page/The+major+new+features+of+Tcl%2FTk+8.6

http://incrtcl.sourceforge.net/itcl/FAQ.html

tcllib

http://core.tcl.tk/tcllib/doc/trunk/embedded/www/tcllib/files/modules/rest/rest.html

https://core.tcl.tk/tcllib/doc/trunk/embedded/www/tcllib/files/modules/nettool/nettool.html

https://core.tcl.tk/tcllib/doc/trunk/embedded/www/tcllib/files/modules/markdown/markdown.html

https://core.tcl.tk/tcllib/doc/trunk/embedded/www/tcllib/files/modules/valtype/isbn.html

https://core.tcl.tk/tcllib/doc/trunk/embedded/www/tcllib/files/modules/base64/base64.html

https://core.tcl.tk/tcllib/doc/trunk/embedded/www/tcllib/files/modules/cron/cron.html

http://core.tcl.tk/tcllib/doc/trunk/embedded/www/tcllib/files/modules/http/autoproxy.html

http://core.tcl.tk/tcllib/doc/trunk/embedded/www/tcllib/files/modules/cmdline/cmdline.html

HTTPD

https://tcl.tk/software/tclhttpd/

Routers

https://www.cisco.com/c/en/us/support/docs/customer-collaboration/unified-customer-voice-portal-901/200909-Overview-of-CVP-Gateway-TCL-Files.html

https://www.androwish.org/index.html/raw/3de97eab9a70cc0cc00e4085c0e16f07379f72c1

https://www.cisco.com/c/en/us/td/docs/interfaces_modules/services_modules/ace/v3-00_A2/configuration/slb/guide/slbgd/script.pdf

UX

https://www.activestate.com/blog/enthusiastic-tcl-users/

Hello World

https://en.wikibooks.org/wiki/Tcl_Programming/Examples

https://en.wikibooks.org/wiki/Tcl_Programming/regexp

https://github.com/ActiveState/code/blob/master/recipes/Tcl/65433_Parsing_comma_separated_values/recipe-65433.tcl

https://www.activestate.com/blog/concurreny-tcl-weaving-threads/

https://yosefk.com/blog/i-cant-believe-im-praising-tcl.html