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  1. or download this
    my $x = 1;
if ($x) {
...
} else {
   g();
}
  2. or download this
    my $x = 0;
if ($x) {
...
} else {
   g();      # g() is the last expression evaluated.
}
  3. or download this
    my $x = 0;
if ($x) {    # $x is the last expression evaluated.
   f();
}
  4. or download this
    my $x = 0;
if ($x == 1) {
...
} elsif ($x == 2) (    # $x==2 is the last expression evaluated.
   g();
}