(gawk) Variables/Fields

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 Variables and Fields
 ====================
 
    `awk' variables are not declared; they come into existence when they
 are first used.  Their values are either floating-point numbers or
 strings.  `awk' also has one-dimensional arrays; multiple-dimensional
 arrays may be simulated.  There are several predefined variables that
 `awk' sets as a program runs; these are summarized below.
 

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* Fields Summary              Input field splitting.
* Built-in Summary            `awk''s built-in variables.
* Arrays Summary              Using arrays.
* Data Type Summary           Values in `awk' are numbers or strings.
 

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