∇res ← integer_arithmetic; l; r
  l ← ⎕
  r ← ⎕
  res ← 6 2 ⍴ 'sum' (l+r) 'diff' (l-r) 'prod' (l×r) 'quot' (⌊l÷r) 'rem' (r|l) 'pow' (l*r)