Conditionals

An if statement lets a Perl program choose a branch.

conditionals.pl

use strict;
use warnings;

my $temperature = ;
my $status = "";

if ($temperature >= 80) {
    $status = "warm";
} else {
    $status = "comfortable";
}

print "temperature=$temperature\n";
print "status=$status\n";

use strict;
use warnings;

my $temperature = ;
my $status = "";

if ($temperature >= 80) {
    $status = "warm";
} else {
    $status = "comfortable";
}

print "temperature=$temperature\n";
print "status=$status\n";

use strict;
use warnings;

my $temperature = ;
my $status = "";

if ($temperature >= 80) {
    $status = "warm";
} else {
    $status = "comfortable";
}

print "temperature=$temperature\n";
print "status=$status\n";

if statement An `if` statement runs its block only when the condition is true.