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.
a simple query

Posted by technocrat2004 (technocrat2004), 27 March 2006
Hi friends,

Can any one explain for the following output

% set a [format "%u" -200]

My intesion is to convert the input to unsigned integer

Posted by admin (Graham Ellis), 27 March 2006
Yes, take the bit pattern of a signed integer of -200 (1's compliment) it is 11111111111111111111111100111000

As an unsigned interger, that works out as 4294967096, which is 200 short of 2 to the power 32.

If you want to strip off the - sign, then use the abs function:

% set val -200
% set val [expr abs($val)]

Posted by technocrat2004 (technocrat2004), 29 March 2006
thank you Graham, thank you very much..

This page is a thread posted to the opentalk forum at 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: • WEB: • SKYPE: wellho