Theorem scandx

Description: Index value of the df-sca slot. (Contributed by Mario Carneiro, 14-Aug-2015) (New usage is discouraged.)

	Ref	Expression
Assertion	scandx	$$⊢\mathrm{Scalar}\left(\mathrm{ndx}\right)=5$$

Proof

Step	Hyp	Ref	Expression
1		df-sca	$$⊢\mathrm{Scalar}=\mathrm{Slot}5$$
2		5nn	$$⊢5\in \mathbb{N}$$
3	1 2	ndxarg	$$⊢\mathrm{Scalar}\left(\mathrm{ndx}\right)=5$$