Gawk variables

Arguments

Arguments are named like in bash, $1 for the first, $2 for the second, etc.
$0 refers to the entire line.

echo "foo" "bar" | awk 'BEGIN { print $1 $2 }'  # foobar

awk -f file.awk "foo" "bar"                     # akw scripts

Assignment

integer = 1;
float = 1.1;
string = "abc";
array[1] = "abc";
result = ( (1/100) * 20 );

Assignment Operators

var+= 1;