Theorem 7ne0

Description: The number 7 is nonzero. (Contributed by SN, 22-Oct-2025)

	Ref	Expression
Assertion	7ne0	|- 7 =/= 0

Proof

Step	Hyp	Ref	Expression
1		7nn	|- 7 e. NN
2	1	nnne0i	|- 7 =/= 0