1.5. Conditionals

If statements

Comparing numbers:

if ($eyeballs >= 2) {
    print "its an alien\n";
}
elsif ($eyeballs == 2) {
    print "its human\n";
}
else {
    print "its a rock\n";
}

Comparing strings requires different operaters:

if ($location eq 'rodeo') {       # if equal
    print "yipikiyiyay\n";
}
elsif ($location ne 'bedroom') {  # if not equal
    print "yawn\n";
}
else {
    print "I am in the bedroom\n";
}

Postfix conditionals

These allow you to write code that reads more like natural language:

print "hello" if $your_name eq 'Barry';
print "hello" unless the_person_looks_scary();

Ternary operator

my $english = $chicken_count == 1
    ? "1 chicken";
    : $chicken_count . " chickens";