Definition df-5

Description: Define the number 5. (Contributed by NM, 27-May-1999)

	Ref	Expression
Assertion	df-5	$$⊢5=4+1$$

Detailed syntax breakdown

Step	Hyp	Ref	Expression
0		c5	$$class5$$
1		c4	$$class4$$
2		caddc	$$class+$$
3		c1	$$class1$$
4	1 3 2	co	$$class\left(4+1\right)$$
5	0 4	wceq	$$wff5=4+1$$