Theorem nncn

Description: A positive integer is a complex number. (Contributed by NM, 18-Aug-1999)

	Ref	Expression
Assertion	nncn	⊢ ( 𝐴 ∈ ℕ → 𝐴 ∈ ℂ )

Proof

Step	Hyp	Ref	Expression
1		nnsscn	⊢ ℕ ⊆ ℂ
2	1	sseli	⊢ ( 𝐴 ∈ ℕ → 𝐴 ∈ ℂ )