Home Accessibility Courses Diary The Mouth Forum Resources Site Map About Us Contact
Learning to program in Perl

For the last few days, I've been teaching Learning to Program in Perl. Unlike a conventional course style, for this one I had been asked to assume no prior programming knowledge, and covered first principles such as variables, conditionals, and loops.

Here is one of the examples I wrote during the course ...

# The bit you do at the start
print "Please enter first number ";
$entry = <STDIN>;
$sofar = 0;
$howmany = 0;
 
# The bit you keep repeating
while ($entry > 0) {
  $sofar += $entry;
  $howmany++;
  print "Please enter next number (0 to end) ";
  $entry = ;
  }
 
# The bit you do at the end
print "The total was $sofar in $howmany entries\n";


You'll note how I have divided a straightforward little application into "the bit that's done once, first", "the bit that's repeated", and "the bit that's done at the end. And you'll note too how important the comments are!

Given a couple of days, we moved on from examples like the one above to a program that was reading and analysing a log file ... and coming out with results. Perl is, after all, the Practical Extraction and Reporting Language
(written 2008-04-11 13:43:00)

 
Associated topics are indexed under
P105 - Perl - Repeating Blocks of Code
Q904 - Object Orientation and General technical topics - Analysing a Programming Task

Back to
Sheep Shearers, Marathon Runners and Ocean Sailors
Previous and next
or
Horse's mouth home
Forward to
Underlining in Perl and Python - the x and * operator in use
Some other Articles
Gauging point at entrance to Bristols Floating Harbour
PHP course dot co, dot uk
Chew Valley Lakes
Underlining in Perl and Python - the x and * operator in use
Learning to program in Perl
Sheep Shearers, Marathon Runners and Ocean Sailors
Learning and understanding scripting programming techniques
M25 / South Mimms Service Area
Do not SHOUT and do not whisper
Automating processes through Expect
2259 posts, page by page
Link to page ... 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46 at 50 posts per page


This is a page archived from The Horse's Mouth at http://www.wellho.net/horse/ - the diary and writings of Graham Ellis. Every attempt was made to provide current information at the time the page was written, but things do move forward in our business - new software releases, price changes, new techniques. Please check back via our main site for current courses, prices, versions, etc - any mention of a price in "The Horse's Mouth" cannot be taken as an offer to supply at that price.

Link to Ezine home page (for reading).
Link to Blogging home page (to add comments).

© WELL HOUSE CONSULTANTS LTD., 2009: Well House Manor • 48 Spa Road • Melksham, Wiltshire • United Kingdom • SN12 7NY
PH: 01144 1225 708225 • FAX: 01144 1225 707126 • EMAIL: info@wellho.net • WEB: http://www.wellho.net • SKYPE: wellho