© William "Bo" Rothwell of One Course Source, Inc. 2020
W. ". RothwellPro Perl Programminghttps://doi.org/10.1007/978-1-4842-5605-3_5

5. Exploring Useful Built-in Variables

William “Bo” Rothwell1 
San Diego, CA, USA
A good deal of the power and flexibility behind Perl lies in its "built-in" variables. Perl’s built-in variables provide many functions:
  • Allows you to modify the behavior of your Perl script

  • Holds important information regarding how your Perl script is running

  • Holds data regarding the results of pattern matching

This chapter provides some insight as to how you can use built-in variables. Note that not all variables will be covered in this chapter as some variables are more useful than others and others are a bit more esoteric. Additionally, ...

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