Theorem nn0re

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

	Ref	Expression
Assertion	nn0re	$$⊢A\in {\mathbb{N}}_0\to A\in ℝ$$

Proof

Step	Hyp	Ref	Expression
1		nn0ssre	$$⊢{\mathbb{N}}_0\subseteq ℝ$$
2	1	sseli	$$⊢A\in {\mathbb{N}}_0\to A\in ℝ$$