Perl | Multi-line Strings | Here Document

本文介绍: 【代码】Pe rl | Mul ti–line Str in gs | He re Doc u m e n t。

原文链接：https://www.geeksforgeeks.org/perl-multi-line-strings-here-document/

Mul ti–line string using Here Doc u men t

Here Documen t i s a n alt er native w a y f o r multiple print statements. A Here-Documen t ca n also be used f o r multi–line string. It declare s a de limiter at the start to know ti ll where the string need s to ta ke input. A Here-Document star ts wi th ‘<<’ f ol lowed b y the de limiter o f the user’s ch o ice. The string read s the code until the de limiter oc cur s a gain and all the text in between i s ta ken as the string.

Ex ample:


```c

```c
# Perl code to illustrate the multiline  
# string using Here-Document 
  
# consider a string scalar 
$GeeksforGeeks = 'GFG'; 
  
# defining multiline string using  
# ending delimiter without any quotes 
$deli = <<string_ending_delimiter; 
  
Multiline string using  
      
     Here-Document on  
      
    $GeeksforGeeks
  
string_ending_delimiter 
  
# displaying result  
print "$delinn"; 
  
# defining multiline string using  
# ending delimiter with double quotes 
$deli = <<"string_ending_delimiter"; 
  
Multiline string using  
      
     Here-Document on  
      
    $GeeksforGeeks
  
string_ending_delimiter 
  
# displaying result  
print "$delinn"; 
  
# defining multiline string using  
# ending delimiter with single quotes 
$deli = <<'string_ending_delimiter'; 
  
Multiline string using  
      
     Here-Document on  
      
    $GeeksforGeeks
  
string_ending_delimiter 
  
# displaying result  
print "$delinn";