Editing rule

Scripts in [[awk]] may contain one or more rules. == Rules consist of patterns and actions == Each rule within an [[awk]] script consists of a [[pattern]] and an associated [[action]]. The [[pattern]] describes a section within a line of text that needs to be matched in order for the associated [[action]] to take place. The [[action]] is enclosed in squiggly [[brace]]s to separate it from the pattern: == Patterns or actions can be omitted from a rule == The [[pattern]] or the [[action]] can be omitted from an [[awk]] rule, but it is not possible for both the [[pattern]] and the [[action]] to omitted. === Omission of the pattern === If a [[rule]] does not include a pattern, then the [[action]] within the [[rule]] is performed for every [[input]] line. === Omission of the action === If a [[rule]] does not include an [[action]], then the [[default action]] is used. The [[default action]] is to output all [[line]]s that matches the [[pattern]]:

Summary:

This change is a minor edit.

Username: