Editing case sensitivity

== Indentifier names == The [[awk]] interpreter is lettercase sensitive. This means that [[variable name]]s that have different letter cases are distinct and separate from each other: {{{ awk # The identifiers dog,Dog and DOG represent separate variables BEGIN { dog = "Benjamin" Dog = "Samba" DOG = "Bernie" printf "The three dogs are named %s, %s and %s.\n", dog, Dog, DOG } }}} == Pattern matching == Because [[awk]] is lettercase sensitive, [[pattern]] matching will only occur if the lettercase of the text matches that used in the [[pattern]]. === Performing case insensitive matching === There are several ways to perform case insensitive letter matching: ==== Using a character list ==== ==== Converting the data to lowercase before attempting to match ==== The [[awk]] extraction and reporting language provides a variety of functions for converting [[string]]s to uppercase or to lowercase: * [[tolower]] - Converts a string to lower case * [[toupper]] - Converts a string to upper case

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This change is a minor edit.

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