github.com/benhoyt/goawk@v1.8.1/testdata/t.cat (about)

     1  {print $2 " " $1}
     2  {print $1 " " "is", $2}
     3  {print $2 FS "is" FS $1}
     4  {print length($1 $2), length($1) + length($2)}