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PERL PROGRAMMING
PERL (Practical Extraction and Report Language) is a relatively new language. It was created in 1986 by Larry Wall. It has gone through a versions Perl, Perl4, and, the newly released Perl5.
Perl is a programming language which can be used for a large variety of tasks. A typical simple use of Perl would be for extracting information from a text file and printing out a report or for converting a text file into another form. But Perl provides a large number of tools for quite complicated problems, including systems programming.
Programs written in Perl are called Perl scripts, whereas the term the perl program refers to the system program named perl for executing Perl scripts.
Perl5 adds the following features:
- Regular expression enhancements
- Arbitrarily nested data structures
- Modularity and reusability
- Object-oriented programming
- Many usability enhancements
- Simplified grammar
- Lexical scoping
- POSIX compliant
- Package constructors and destructors
- Multiple simultaneous DBM implementations
- Subroutine definitions may now be autoloaded
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