第三章

数组元素是以连续的整数来编号,从0开始,之后的每一个元素依次加1

[root@june3 perl]# cat a2.pl 
@rocks=qw/a b c d e f g/;
print "$#rocks is $#rocks
";
print "$rocks[$#rocks]
";
[root@june3 perl]# perl a2.pl 
$#rocks is 6
g

$#rocks 最后一个元素的索引值

reverse 操作符:
[root@june3 perl]# cat a3.pl 
@fred = 6..10;
@barney = reverse @fred;
print "@fred is @fred
";
print "@barney is @barney
";
[root@june3 perl]# perl a3.pl 
@fred is 6 7 8 9 10
@barney is 10 9 8 7 6



[root@june3 perl]# cat a4.pl 
@lines = <STDIN>;
chomp @lines;
print "@lines is @lines
";

[root@june3 perl]# perl a4.pl 
1
2
3
@lines is 1 2 3