Simple Perl Problem?

[Davy]

Hi all,

I am a Perl newbie.

$cnt1 = 2;
$cnt2 = 3;

And I want to directly print $cnt1+$cnt2. (i.e. print 5)

But it seems print "$cnt1+$cnt2"; and print '$cnt1+$cnt2'; does not
work.

How to do it?

Best regards,
Davy

 

[John W. Krahn]

I am a Perl newbie.

$cnt1 = 2;
$cnt2 = 3;

And I want to directly print $cnt1+$cnt2. (i.e. print 5)

But it seems print "$cnt1+$cnt2"; and print '$cnt1+$cnt2'; does not
work.

How to do it?

print $cnt1 + $cnt2;



John

 

[raghu]

If you want to print the result for example addition you should not put
in double or single quoted strings rather you can assign the value of
addition to third variable and then you can put in double strings, it
will give result, as you assigned to another variable and you can't use
single quoted string if you use it will print what is included in that
string but not value,that's the real magic of perl.

 

[Jürgen Exner]

$cnt1 = 2;
$cnt2 = 3;

And I want to directly print $cnt1+$cnt2. (i.e. print 5)

But it seems print "$cnt1+$cnt2";

Double quotes define a string(!) where variables are interpolated, i.e.
their names are replaced with their values.

and print '$cnt1+$cnt2'; does not work.

Single quotes define a literal string(!), i.e. variables are _not_
interpolated.
But you don't want a string in the first place, you want perl to evaluate an
expression.

How to do it?

Simple. You don't want a string, so loose those quotes and write an
expression instead:

print $cnt1 + $cnt2;

jue