Theorem 9ne0

Description: The number 9 is nonzero. (Contributed by SN, 22-Oct-2025)

	Ref	Expression
Assertion	9ne0	$$⊢9\ne 0$$

Proof

Step	Hyp	Ref	Expression
1		9nn	$$⊢9\in \mathbb{N}$$
2	1	nnne0i	$$⊢9\ne 0$$