Theorem 4ne0

Description: The number 4 is nonzero. (Contributed by David A. Wheeler, 5-Dec-2018)

	Ref	Expression
Assertion	4ne0	$$⊢4\ne 0$$

Proof

Step	Hyp	Ref	Expression
1		4re	$$⊢4\in ℝ$$
2		4pos	$$⊢0<4$$
3	1 2	gt0ne0ii	$$⊢4\ne 0$$