perl - 与我在 perl 中的变量混淆

Question

如果使用 use strict和 use warning和
如果我指定 my数据类型，它有效；如果我不指定 my它说错误。

use strict;
use warnings;
my $test=10;
my @arr=(10,20,30);

如果我将数组变量名称声明为数字:

 use strict;
 use warnings;
 my @100=(10,20,30);

然后当我运行该程序时，它说错误:

 Can't use global @100 in "my" at number_sclar.pl line 28, near "my @100"

如果我删除了 my并运行该程序，它运行没有错误。

所以请谁能告诉我为什么 my数字数组变量名称不支持变量？

Answer 1

来自 perldoc perlvar :

Perl identifiers that begin with digits, control characters, or punctuation characters are exempt from the effects of the "package" declaration and are always forced to be in package "main"; they are also exempt from "strict 'vars'" errors. A few other names are also exempt in these ways...