gawk: Expressions

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1 6 Expressions
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1 Expressions are the basic building blocks of 'awk' patterns and actions.
1 An expression evaluates to a value that you can print, test, or pass to
1 a function.  Additionally, an expression can assign a new value to a
1 variable or a field by using an assignment operator.
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1    An expression can serve as a pattern or action statement on its own.
1 Most other kinds of statements contain one or more expressions that
1 specify the data on which to operate.  As in other languages,
1 expressions in 'awk' can include variables, array references, constants,
1 and function calls, as well as combinations of these with various
1 operators.
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Menu

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· Values                      Constants, Variables, and Regular Expressions.
· All Operators               'gawk''s operators.
· Truth Values and Conditions Testing for true and false.
· Function Calls              A function call is an expression.
· Precedence                  How various operators nest.
· Locales                     How the locale affects things.
· Expressions Summary         Expressions summary.
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