sub sga {
    if (COND) {
        1;
    } else {
        2;
    }
}
sub sgb {
    COND and 
        return 1;
    2;
}
sub sgc {
    COND ?
        1 :
        2;
}

##</code><code>##

sub sgb_prime {
    COND and do {
        somecommand();
        somemorecommand();
        return 1;
    };
    evenmorecommand();
    verylongsequenceofcommands();
    andsomemore();
    2;
}