Beefy Boxes and Bandwidth Generously Provided by pair Networks
Welcome to the Monastery
 
PerlMonks  

Re^3: New student, can we write this program in perl...

by choroba (Canon)
on Oct 19, 2012 at 17:15 UTC ( #999986=note: print w/ replies, xml ) Need Help??


in reply to Re^2: New student, can we write this program in perl...
in thread New student, can we write this program in perl...

I would change your program to this one:

#!/usr/bin/perl use warnings; use strict; print 'Enter the number of elements: '; my $n = <>; # Read the input. chomp $n; # Remove the newline. print "Enter $n numbers.\n"; my @a; for (1 .. $n) { push @a, scalar <>; # Push numbers to the +array. } chomp @a; # Remove the newlines. print join (' ', 'The even numbers are:', grep $_ % 2, @a), # grep filters the num +bers = 1 modulo 2 "\n"; print join (' ', 'The odd numbers are:', grep 1 - $_ % 2, @a), "\n";
Not really similar, is it? The main differences:
  • No main function needed.
  • Variables are declared where needed.
  • The diamond operator is used to read from the input.
  • for can be used with simpler syntax, avoiding off by 1 errors (see perlsyn)
  • grep can be used to filter arrays. No need for temporary variables to keep the results if you do not need them later.
لսႽ ᥲᥒ⚪⟊Ⴙᘓᖇ Ꮅᘓᖇ⎱ Ⴙᥲ𝇋ƙᘓᖇ


Comment on Re^3: New student, can we write this program in perl...
Select or Download Code

Log In?
Username:
Password:

What's my password?
Create A New User
Node Status?
node history
Node Type: note [id://999986]
help
Chatterbox?
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others lurking in the Monastery: (10)
As of 2015-07-06 11:22 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?

    The top three priorities of my open tasks are (in descending order of likelihood to be worked on) ...









    Results (72 votes), past polls