Just a question to clarify: How are you adding just one argument? I mean, your code seems to be implying that you'll be doing something like add( 5 ); - that is if $ARGV[1] contains 5. That just doesn't seem to make sense, most of the time adding takes two parameters, like add( 5, 2 ), I can reasonably guess what that will do, but not add( 5 ).

    -Bryan

yes Brayan your right, the script would be called 
with 2 arguments, similar to...

  add 3 5

which will pass the 'add' argument ($ARGV[0]) and 
the '3' and '5' arguments ($ARGV[1] and $ARGV[2]).
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Firstly, start your code with use strict; and use warnings;. Secondly you might try indenting your code a bit so that it's easier to read. Thirdly, for string comparisons you want to use eq and not =~.

Lastly, I think mrborisguy is right on the money. You'll have to take three arguments from the command line. (An operation and two numbers.) If your (homework?) problem description says otherwise, that's do-able too.

use strict;
use warnings;

if ($ARGV[0] eq "add") 
     { 
     $rtn = add($ARGV[1]); 
     print "The sum is: $rtn";
     } 
elsif ($ARGV[0] eq "multiply") 
     { 
     $rtn = multiply($ARGV[1]); 
     print "The product is: $rtn";
     } 
else {
     # error message goes here
     # argv[0] was neither add nor multiply
     }

sub add { 
 
}

sub multiply { 
 
}
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Cheers,

Brent

hey guys thanks, ...i apprecite it..
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sub add{
  shift(@_) + (@_? add(@_):0)
}

#Test the "add" routine ..
print add(qw/3 0 0 1 0 1 01 1 1 1 1 0 1 /);
# Outputs : 
#  11
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i got this code but when i tested it i got no result:

if ($ARGV[0] eq "add")
{
$rtn = add($ARGV[1]);
print " The sum is $rtn";
}
elsif ($ARGV[0] eq "multiply")
{
$rtn = multiply($ARGV[1]);
print "ther prod is $rtn";
}
sub add{
my ($sum);
$sum=0;
foreach $_(@_) {
$sum +=$_;
}
return $sum;
}
sub multiply {
my ($multiply);
$product=0;
foreach $_(@_) {
$product+=$_;
}
return $multiply:
}

am i doing it right?
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Your sub add is OK, but multiply seems to be just a copy of add, so it will not multiply.

You have also continued to ignore previous good advice, starting from mrborisguy's - You need 3 arguments to your program - the Operation to perform and at least 2 operands.

We will continue to help you, and it is OK to post more code and questions here - in fact that is encouraged - but you need to show some effort, and regard for good advice.

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