Theorem nn0cn

Description: A nonnegative integer is a complex number. (Contributed by NM, 9-May-2004)

	Ref	Expression
Assertion	nn0cn	$$⊢A\in {\mathbb{N}}_0\to A\in ℂ$$

Proof

Step	Hyp	Ref	Expression
1		nn0sscn	$$⊢{\mathbb{N}}_0\subseteq ℂ$$
2	1	sseli	$$⊢A\in {\mathbb{N}}_0\to A\in ℂ$$