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📜  Perl字符串转义字符

📅  最后修改于: 2021-01-07 08:29:13             🧑  作者: Mango

Perl字符串转义字符

所有特殊字符或符号(如@，＃，$，＆/，\等)均无法正常print。他们需要前面的转义字符反斜杠(\)才能打印。

Perl显示电子邮件地址

所有电子邮件地址都包含(@)符号。如前所述，符号通常不会在字符串打印。他们需要特别注意。 @符号前使用反斜杠(\)来print电子邮件地址。

use strict;
use warnings;
my $site  = "javatpoint\@gmail.com";
print "$site\n";

输出：

javatpoint@gmail.com

Perl $符号嵌入双引号字符串

如果要在字符串print($)符号，请在$符号前面使用反斜杠(\)。

use strict;
use warnings;
my $msg1 = 'Ana';
print "We have defined \$msg1 as $msg1\n";

输出：

We have defined $msg1 as Ana

Perl转义转义字符

如果要在字符串print(\)符号，请在\符号前面使用反斜杠(\)。

use strict;  
use warnings;  
print "The \\n is a new line chracter in programming languages.\n";

输出：

Everyone has to follow this rule whether its a boy\girl

Perl转义双引号

如果要在字符串print双引号，请在两个引号处都使用反斜杠(\)。

use strict;
use warnings;
my $x = 'tutorials';
print "Our site \"javaTpoint\" provides all type of \"$x\"\n";

输出：

Our site "javaTpoint" provides all type of "tutorials?

Perl Double-q运算符q

“ qq”运算符用括号将字符串周围的双引号替换。这意味着(“”)在此字符串不再是必需的。它只会用qqprint字符串。

但是，如果要在字符串中使用括号，则需要在字符串周围使用大括号{}。

而且，如果您需要在字符串内使用花括号，则可以在字符串周围使用方括号[]。

#use of qq
use strict;
use warnings;
my $x = 'tutorials';
print qq(Our site "javaTpoint" provides all type of "$x"\n);
#use of {} brackets
print qq{Our site (javaTpoint) provides all type of "$x"\n};
#use of [] brackets
print qq[Our site (javaTpoint} provides all type of "$x"\n];

输出：

Our site "javaTpoint" provides all type of "tutorials"
Our site (javaTpoint) provides all type of "tutorials"
Our site (javaTpoint} provides all type of "tutorial"

Perl单q运算符，q

单个'q'运算符用作字符串的单引号(')。像单引号一样，它也不插入变量。

#use of q
use strict;
use warnings;
my $x = 'tutorials';
print q(Our site "javaTpoint" provides all type of "$x"\n);
print"\n";
#use of () brackets
print q(Our site "javaTpoint" provides all type of "$x"\n);
print"\n";
#use of {} brackets
print q{Our site )javaTpoint( provides all type of "$x"\n};
print"\n";
#use of {} brackets
print q[Our site )javaTpoint} provides all type of "$x"\n];

输出：

Our site "javaTpoint" provides all type of "$x"\n
Our site "javaTpoint" provides all type of "$x" \n
Our site )javaTpoint( provides all type of "$x" \n
Our site )javaTpoint} provides all type of "$x" \n