Date Published: 1999-11-01

by D. Jasmine Merced
TNS Group, Inc.

Review

Remember, this is a quick review of all we've discussed so far. Each of the 4 topics noted below have already been covered comprehensively. If you're confused or don't understand anything that's presented below, please refer to the relevant articles.

1. Variables
   Variables are simply, put data that can be changed. The variable comes in 2 parts: the name and the value. The variable name always begins with a dollar sign ($). The value is typically enclosed in single or double quote. There are strict guidelines for defining values. If you forgot what they are, you can review our scalar discussion.
2. Arrays
   Arrays are lists of data. The array comes in 2 parts also: the name and the value, which is in a list form. The array name typically begins with an "at" symbol (@). Each of the list items (values) are enclosed in quote in a fashion similar to variables. There are strict guidelines for defining values. If you forgot what they are, you can review our arrays discussion.
3. Hashes (Associative Arrays)
   Hashes (associative arrays) are lists of lists. The most common hashes also come in 2 parts like variables and arrays, hashes typically begin with a percent sign (%). Review the hashes discussion.
4. Subroutines
   Subroutines are a line or lines of code that is enclosed in curly braces ({}) that performs specific functions. Review the subroutines discussion

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D. Jasmine Merced is a partner in Tintagel Net Solutions Group, Inc. and the administrator of The Perl Archive. She also serves as a Director of the World Organization of Webmasters.