Unix and Shell Programming Chapter 12 AWK PART 1

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AWK: Execution; Fields and Records - Bufferes and variables; Scripts - Initialization processing, body processing, end processing; Operations; Patterns - Simple patterns, Nothing, Range Patterns; Actions - Expression Statement, Output Statements, Decision Statements, Control Actions, Loops; Associative Arrays - Processing Arrays, Delete Array Entry; String Function - Length, Index, Substring, Split, Substitution, Global Substitution, Match, Toupper and tolower; Mathematical functions; User-Defined Functions; Using System Commands in awk - pipes, system functions; Applications - Phone lists, Count lines and words, print line following a blank line, print line before a blank line, merge files; awk and grep;