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

     1  { print NR, $1, $1+$1, $1-$1, $1 * $1 }
     2  { print NR, $1/NR, $1 % NR }
     3  # { print NR, $1++, $1--, --$1, $1-- }  # this depends on order of eval of args!
     4  { print NR, -$1 }
     5  $1 > 0 { print NR, $1 ^ 0.5 }
     6  $1 > 0 { print NR, $1 ** 0.5 }