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Metamath Proof Explorer

Theorem nn0rei

Description: A nonnegative integer is a real number. (Contributed by NM, 14-May-2003)

		Ref	Expression
	Hypothesis	nn0rei.1	$⊢ A \in ℕ_{0}$
	Assertion	nn0rei	$⊢ A \in ℝ$

Step	Hyp	Ref	Expression
1		nn0rei.1	$⊢ A \in ℕ_{0}$
2		nn0ssre	$⊢ ℕ_{0} \subseteq ℝ$
3	2 1	sselii	$⊢ A \in ℝ$