Theorem 2nn0

Description: 2 is a nonnegative integer. (Contributed by Raph Levien, 10-Dec-2002)

	Ref	Expression
Assertion	2nn0	⊢ 2 ∈ ℕ0

Proof

Step	Hyp	Ref	Expression
1		2nn	⊢ 2 ∈ ℕ
2	1	nnnn0i	⊢ 2 ∈ ℕ0