Programming Forums > Script Programming > Perl

teishu · Jun 13th, 2007, 4:11 PM

hi, just learning perl can someone tell me whats wrong with this:

print "The months of the year are: \n";
@months = ("January \n", "Febuary \n", "March \n", "April \n", "and so on... \n")
for $i (1, 2, 3, 4, 5) {
	print "@months \n";
	}

i get this error:

(Toggle Plain Text)

teishu@debian:~/prl$ perl months.pl
syntax error at months.pl line 5, near "$i ("
Execution of months.pl aborted due to compilation errors.

thanks

DaWei · Jun 13th, 2007, 4:48 PM

No error that trashes your program is a small error. The forum gets lebenty-jillion posts that claim failures are a bug. Bugs are relatively common, but they don't hold a candle, percentage-wise, to the mistakes that are programmer generated. Instead of asking "What's wrong with this", would you care to explain the difference between what you expect and what you get?

If not, we'll have to presume what you want versus what you get. At zero dollars per hour, that's not very profitable. Regardless of our altruistic propensities, that's not very satisfying.

Your move.

Infinite Recursion · Jun 13th, 2007, 9:17 PM

You are missing a ; after your array list. It should run then, but you probably won't get what you expect.

snipertomcat · Jun 14th, 2007, 12:24 AM

Exactly what do you want the program to do?

DaWei · Jun 14th, 2007, 12:52 AM

Every language and every application has fuck-ups. Ninety-nine percent of them are upstream, between the user's fingertips and the user's purported brain. Would you care to expand upon your problem, in some sort of meaningful detail?

Infinite Recursion · Jun 14th, 2007, 2:03 AM

Lets take a random stab in the dark and assume he wants to print out the contents of the month array accessing one element at a time.

If this is not what you want, elaborate.

(Toggle Plain Text)

#!/usr/bin/perl

print "The months of the year are: \n";
@months = ("January", "Febuary", "March", "April", "and so on...");
for ($i = 0; $i < 5; $i++) 
{
        print "$months[$i]\n";
}

On a side note, why even include a newline in the values of the array? This is more of a formatting option than it is part of the data... so imho, its best left for the print statement to handle.

On another side note, why even care how many elements the array has when printing it, if you are going to print them all anyway... do this:

(Toggle Plain Text)

#!/usr/bin/perl

print "The months of the year are: \n";
@months = ("January \n", "Febuary \n", "March \n", "April \n", "and so on... \n");

foreach $myMonth (@months)
{
        print "$myMonth\n";
}

teishu · Jun 15th, 2007, 7:08 PM

Quote:

Originally Posted by Infinite Recursion

Lets take a random stab in the dark and assume he wants to print out the contents of the month array accessing one element at a time.

If this is not what you want, elaborate.

(Toggle Plain Text)

#!/usr/bin/perl

print "The months of the year are: \n";
@months = ("January", "Febuary", "March", "April", "and so on...");
for ($i = 0; $i < 5; $i++) 
{
        print "$months[$i]\n";
}

On a side note, why even include a newline in the values of the array? This is more of a formatting option than it is part of the data... so imho, its best left for the print statement to handle.

On another side note, why even care how many elements the array has when printing it, if you are going to print them all anyway... do this:

(Toggle Plain Text)

#!/usr/bin/perl

print "The months of the year are: \n";
@months = ("January \n", "Febuary \n", "March \n", "April \n", "and so on... \n");

foreach $myMonth (@months)
{
        print "$myMonth\n";
}

yeh, thats what i was trying to do... im just learning the basic syntax at the moment...

Infinite Recursion · Jun 17th, 2007, 9:47 AM

Perl is a good language... it gets more cryptic as you go.

Glad it worked out for ya.

mackenga · Jul 10th, 2007, 5:54 PM

Yeah, good luck with Perl - it's actually quite a gentle learning curve and very rewarding, but there's an enormous amount of it to learn. I've been programming in Perl for years now and still feel like I've just scratched the surface - but that's not to say it hasn't already been incredibly useful to me. Nice choice. When you meet regular expressions, don't run for the hills: read slowly, understand them a bit at a time and they're amazing.

Jun 13th, 2007, 4:11 PM	#1
teishu Programmer Join Date: May 2006 Posts: 49 Rep Power: 0	small error.. hi, just learning perl can someone tell me whats wrong with this: (Toggle Plain Text) print "The months of the year are: \n"; @months = ("January \n", "Febuary \n", "March \n", "April \n", "and so on... \n") for $i (1, 2, 3, 4, 5) { print "@months \n"; } print "The months of the year are: \n"; @months = ("January \n", "Febuary \n", "March \n", "April \n", "and so on... \n") for $i (1, 2, 3, 4, 5) { print "@months \n"; } i get this error: (Toggle Plain Text) teishu@debian:~/prl$ perl months.pl syntax error at months.pl line 5, near "$i (" Execution of months.pl aborted due to compilation errors. teishu@debian:~/prl$ perl months.pl syntax error at months.pl line 5, near "$i (" Execution of months.pl aborted due to compilation errors. thanks __________________ Intel Pentium M 1.73Ghz -- Sony Vaio -- 1024MB Ram -- Ubuntu 8.04 AMD Athlon X2 4200+ -- Asus V3-M2V890 -- 2GB Kingston -- Vista Ultimate 32bit Intel C2D E4400 -- 2048MB GeIL - Windows XP SP2 *ASCII stupid question, get a stupid ANSI !*

Jun 13th, 2007, 4:48 PM	#2
DaWei Resident Grouch Join Date: Jun 2005 Posts: 6,453 Rep Power: 10	No error that trashes your program is a small error. The forum gets lebenty-jillion posts that claim failures are a bug. Bugs are relatively common, but they don't hold a candle, percentage-wise, to the mistakes that are programmer generated. Instead of asking "What's wrong with this", would you care to explain the difference between what you expect and what you get? If not, we'll have to presume what you want versus what you get. At zero dollars per hour, that's not very profitable. Regardless of our altruistic propensities, that's not very satisfying. Your move. __________________ Abstraction doesn't make it impossible to write bad code; it makes it possible to write superior code. Contributor's Corner: Grumpy on C++ Exceptions DaWei on Pointers

Jun 13th, 2007, 9:17 PM	#3
Infinite Recursion Programming Guru Join Date: Jul 2004 Location: United States Posts: 3,467 Rep Power: 8	You are missing a ; after your array list. It should run then, but you probably won't get what you expect. __________________ http://jasonpowers.net "There are a thousand hacking at the branches of evil to one who is striking at the root."

Jun 14th, 2007, 12:24 AM	#4
snipertomcat Programmer Join Date: Nov 2005 Location: Spring Valley, CA Posts: 52 Rep Power: 3	Exactly what do you want the program to do? __________________ if (u=an_asshole) then GOTO (hell)

Jun 14th, 2007, 12:52 AM	#5
DaWei Resident Grouch Join Date: Jun 2005 Posts: 6,453 Rep Power: 10	Every language and every application has fuck-ups. Ninety-nine percent of them are upstream, between the user's fingertips and the user's purported brain. Would you care to expand upon your problem, in some sort of meaningful detail? __________________ Abstraction doesn't make it impossible to write bad code; it makes it possible to write superior code. Contributor's Corner: Grumpy on C++ Exceptions DaWei on Pointers

Jun 14th, 2007, 2:03 AM	#6
Infinite Recursion Programming Guru Join Date: Jul 2004 Location: United States Posts: 3,467 Rep Power: 8	Lets take a random stab in the dark and assume he wants to print out the contents of the month array accessing one element at a time. If this is not what you want, elaborate. (Toggle Plain Text) #!/usr/bin/perl print "The months of the year are: \n"; @months = ("January", "Febuary", "March", "April", "and so on..."); for ($i = 0; $i < 5; $i++) { print "$months[$i]\n"; } #!/usr/bin/perl print "The months of the year are: \n"; @months = ("January", "Febuary", "March", "April", "and so on..."); for ($i = 0; $i < 5; $i++) { print "$months[$i]\n"; } On a side note, why even include a newline in the values of the array? This is more of a formatting option than it is part of the data... so imho, its best left for the print statement to handle. On another side note, why even care how many elements the array has when printing it, if you are going to print them all anyway... do this: (Toggle Plain Text) #!/usr/bin/perl print "The months of the year are: \n"; @months = ("January \n", "Febuary \n", "March \n", "April \n", "and so on... \n"); foreach $myMonth (@months) { print "$myMonth\n"; } #!/usr/bin/perl print "The months of the year are: \n"; @months = ("January \n", "Febuary \n", "March \n", "April \n", "and so on... \n"); foreach $myMonth (@months) { print "$myMonth\n"; } __________________ http://jasonpowers.net "There are a thousand hacking at the branches of evil to one who is striking at the root."

Jun 17th, 2007, 9:47 AM	#8
Infinite Recursion Programming Guru Join Date: Jul 2004 Location: United States Posts: 3,467 Rep Power: 8	Perl is a good language... it gets more cryptic as you go. Glad it worked out for ya. __________________ http://jasonpowers.net "There are a thousand hacking at the branches of evil to one who is striking at the root."

Jul 10th, 2007, 5:54 PM	#9
mackenga Professional Programmer Join Date: Mar 2005 Location: Glasgow, Scotland Posts: 314 Rep Power: 4	Yeah, good luck with Perl - it's actually quite a gentle learning curve and very rewarding, but there's an enormous amount of it to learn. I've been programming in Perl for years now and still feel like I've just scratched the surface - but that's not to say it hasn't already been incredibly useful to me. Nice choice. When you meet regular expressions, don't run for the hills: read slowly, understand them a bit at a time and they're amazing. __________________ "I'm not a genius. Why do I have to suffer?"

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Programming Forums > Script Programming > Perl

small error..