Introduction
Perl is a interpreted language. It is almost available in all popular operating systems today. Perl will be similar to C language and awk.
Basics
- Perl script file mostly will have the extension .pl
- In unix and Linux flavours, the perl file should have an execution permission.
- Start the perl script file with #!/usr/bin/perl
- Dont forget to terminate perl commands with ; (semicolen). eg., print “Hello world\n”;
program 1
Always the first program I try on any language is hello world, so perl’s hello world program is here for Linux and UNIX flavours,
#!/usr/bin/perl print "Hello world.\n";
In Windows the same program will look like,
#!D:/perl/perl.exe print "Hello world.\n";
- The first line (in both examples) is a comment for perl, but for shell it tells which interpriter in what path to use on the file.
- The second command print is similar to printf in C language with some difference. Lets learn the difference later.
Output
