Theorem nn0cn

Description: A nonnegative integer is a complex number. (Contributed by NM, 9-May-2004)

	Ref	Expression
Assertion	nn0cn	|- ( A e. NN0 -> A e. CC )

Proof

Step	Hyp	Ref	Expression
1		nn0sscn	|- NN0 C_ CC
2	1	sseli	|- ( A e. NN0 -> A e. CC )