Hour 2. Perl's Building Blocks: Numbers and Strings

What You'll Learn in This Hour:

Every programming language—and every human language—has a similar beginning: You have to have something to talk about. In Perl, numbers and strings are the basic unit of conversation, and these are called scalars.

Every hour in this book deals in some way with scalars—increasing, decreasing, querying, testing, collecting, clearing, separating, folding, sorting, saving, loading, printing, and deleting them. Scalars are Perl's singular nouns; they can represent a word, a record, a document, a line of text, or a character.

Some scalars in Perl can represent information that does not change over the life of the ...

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