Solved

Perl programming problem 2

Posted on 2000-04-17
10
151 Views
Last Modified: 2010-03-05
Use the fallowing algebraic formula to write a program in perl that calculates and prints the sum of the integers from 1 to n where n is obtained as user input from the keyboard.

The formula is:  sum of 1 to n:  n x (n+1)
0
Comment
Question by:myoreorex
  • 6
  • 3
10 Comments
 

Author Comment

by:myoreorex
ID: 2724419
Adjusted points from 25 to 125
0
 
LVL 16

Accepted Solution

by:
maneshr earned 125 total points
ID: 2724420
#!/usr/local/bin/perl

print "Enter a number ";
$user_input=<STDIN>;
chomp($user_input); ## Remove the \n from the users input

$user_input=~ s/\s+//g; ## Remove any white spaces from the user's input.

if ($user_input!~ /^[+-]?\d+$/){
  print "Please enter ONLY integers\n";
  exit;
}

$summ=$user_input * ($user_input+1);
print $summ,"\n";
0
 

Author Comment

by:myoreorex
ID: 2724522
This question has a deletion request Pending
0
 
LVL 16

Expert Comment

by:maneshr
ID: 2724709
This question no longer is pending deletion
0
 
LVL 16

Expert Comment

by:maneshr
ID: 2724710
why have you requested a delete for this Q??

0
Find Ransomware Secrets With All-Source Analysis

Ransomware has become a major concern for organizations; its prevalence has grown due to past successes achieved by threat actors. While each ransomware variant is different, we’ve seen some common tactics and trends used among the authors of the malware.

 
LVL 16

Expert Comment

by:maneshr
ID: 2724719
i think this is what you might want...

#!/usr/local/bin/perl

print "Enter a number ";
$user_input=<STDIN>;
chomp($user_input); ## Remove the \n from the users input
$user_input=~ s/\s+//g; ## Remove any white spaces from the user's input.
if ($user_input!~ /^[+-]?\d+$/){
  print "Please enter ONLY integers\n";
  exit;
}

foreach (1..$user_input){
  $ans+=$_;
}
print $ans,"\n";
0
 
LVL 16

Expert Comment

by:maneshr
ID: 2728133
did you get a chance to try out the solution??

did it work??

let me know.

0
 
LVL 3

Expert Comment

by:jkstill
ID: 2735498
Hmm....

This really looks like someones homework to me.

0
 

Author Comment

by:myoreorex
ID: 2735613
Thank you for being the nicest most professional one.

michelle
0
 
LVL 16

Expert Comment

by:maneshr
ID: 2740441
most welcome to be of help to you. :-)

Rgds
0

Featured Post

Free Trending Threat Insights Every Day

Enhance your security with threat intelligence from the web. Get trending threat insights on hackers, exploits, and suspicious IP addresses delivered to your inbox with our free Cyber Daily.

Join & Write a Comment

Many time we need to work with multiple files all together. If its windows system then we can use some GUI based editor to accomplish our task. But what if you are on putty or have only CLI(Command Line Interface) as an option to  edit your files. I…
In the distant past (last year) I hacked together a little toy that would allow a couple of Manager types to query, preview, and extract data from a number of MongoDB instances, to their tool of choice: Excel (http://dilbert.com/strips/comic/2007-08…
Explain concepts important to validation of email addresses with regular expressions. Applies to most languages/tools that uses regular expressions. Consider email address RFCs: Look at HTML5 form input element (with type=email) regex pattern: T…
Illustrator's Shape Builder tool will let you combine shapes visually and interactively. This video shows the Mac version, but the tool works the same way in Windows. To follow along with this video, you can draw your own shapes or download the file…

760 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

19 Experts available now in Live!

Get 1:1 Help Now