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Perl programming problem 2

Posted on 2000-04-17
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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)
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Question by:myoreorex
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10 Comments
 

Author Comment

by:myoreorex
ID: 2724419
Adjusted points from 25 to 125
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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";
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Author Comment

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

Expert Comment

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

Expert Comment

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

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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
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