Perl qw FunctionNEW!!! Check my new resource: Perl How To Tutorial eBooks It is a handy shortcut that you can use to eliminate the quotes in a list area and make your script more readable. In other words, qw will automatically quote string values for you. qw is either known as a function or an operator and it means the same thing. Its syntax form is as follows: In the EXPR it is not allowed to do any interpolation. You can use any set of delimiters, not just the parentheses (for example qw/EXPR/ is another popular way to use it). In the EXPR, the words can be separated with any whitespace, including newlines. You can use the Perl qw operator if each word of the list has no whitespace characters included. Check my new How To Tutorial eBooks (PDF format): to see a lot of fully commented examples that help you use the Perl statements and the Perl buit-in functions in your scripts. In the following example we use single quotes, double quotes and the Perl qw operator to create an array. All the three forms are equivalent: As you can see in this example, if you have a longer list of words and you don’t use the Perl qw function, you need to type yourself a lot of commas and quotes to separate the words and your script can become difficult to read. But don’t mix the commas with the whitespace to separate the words because this will produce warnings if you will run the script with the warnings enabled. This code will output: You can use the qw function when you have a list of predefined strings, for example the text messages associated with some error codes: Here’s the output: Please click here to download the Perl qw script with all the above examples included. (regarding tips and tricks to manipulate multidimensional arrays and hashes in Perl) and you'll receive a link to download for FREE my Perl chomp Function Tutorial eBook (a $7.50 value), it's a bonus for you and I hope you'll enjoy it. You can see its Table of Contents here (if you subscribe to my free newsletter, you don't have to pay for this eBook or use your paypal account). Don't forget to check my new How To Tutorial eBooks (PDF format): to see a lot of fully commented examples that help you use the Perl statements and the Perl buit-in functions in your scripts. NEW!!! Do you want more information about the basic Perl topics? Check my new "Perl How To" Tutorial eBooks page where I'll answer the most frequent questions regarding some topics : Table of Contents: A Perl Script Install Perl Running Perl Perl Data Types Perl Variables Perl Operators Perl Lists Perl Arrays Array Size Array Length Perl Hashes Perl Statements Perl if Perl unless Perl switch Perl while Perl do-while Perl until Perl do-until Perl for Perl foreach Built-in Perl Functions Functions by Category String Functions Array Functions Functions in alphabetical order chomp chop chr crypt defined grep hex index join lc lcfirst length map oct ord pack pop push qw reverse rindex scalar shift sort splice split substr uc undef unshift return from Perl qw function to Perl Basics Hit the Alarm Clock! 
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