my $x = 1;
if ($x) {
   f();      # f() is the last expression evaluated.
} else {
   g();
}

##</code><code>##

my $x = 0;
if ($x) {
   f();
} else {
   g();      # g() is the last expression evaluated.
}

##</code><code>##

my $x = 0;
if ($x) {    # $x is the last expression evaluated.
   f();
}

##</code><code>##

my $x = 0;
if ($x == 1) {
   f();
} elsif ($x == 2) (    # $x==2 is the last expression evaluated.
   g();
}