gawk: Built-in Variables

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1 7.5 Predefined Variables
1 ========================
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1 Most 'awk' variables are available to use for your own purposes; they
1 never change unless your program assigns values to them, and they never
1 affect anything unless your program examines them.  However, a few
1 variables in 'awk' have special built-in meanings.  'awk' examines some
1 of these automatically, so that they enable you to tell 'awk' how to do
1 certain things.  Others are set automatically by 'awk', so that they
1 carry information from the internal workings of 'awk' to your program.
1 
1    This minor node documents all of 'gawk''s predefined variables, most
1 of which are also documented in the major nodes describing their areas
1 of activity.
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Menu

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· User-modified               Built-in variables that you change to control
1                                 'awk'.
· Auto-set                    Built-in variables where 'awk' gives
1                                 you information.
· ARGC and ARGV               Ways to use 'ARGC' and 'ARGV'.
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