Theorem 10nn0

Description: 10 is a nonnegative integer. (Contributed by Mario Carneiro, 19-Apr-2015) (Revised by AV, 6-Sep-2021)

	Ref	Expression
Assertion	10nn0	$$⊢10\in {\mathbb{N}}_0$$

Proof

Step	Hyp	Ref	Expression
1		1nn0	$$⊢1\in {\mathbb{N}}_0$$
2		0nn0	$$⊢0\in {\mathbb{N}}_0$$
3	1 2	deccl	$$⊢10\in {\mathbb{N}}_0$$