以下是使用定义在Perl中初始化标量变量的最佳方式吗？
my $var;
if (cond) {
$var = "string1";
}
# Is this the correct way?
if (defined $var) {
...
}
my $var;
if (cond) {
$var = "string1";
}
# Is this the correct way?
if (defined $var) {
...
}