Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Different languages use different symbols for the concatenation operator. Most languages use the "+" symbol, though several deviate from this norm. AWK is a programming language designed for processing text-based data, either in files or data streams. It is an example of a programming language that extensively uses the string datatype, associative arrays (that is, arrays indexed by key strings), and regular expressions.

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