IsInt ← ⊢(0=|˜)⍟⊢1=•Type

IsInt¨⊸≍˘ ⟨+, 0, ∞, ⊘, ¯∞, 'q', ¯42, ∞-∞, "BQN", 1e¯300, 9e15, π⟩