Theorem zcn

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

	Ref	Expression
Assertion	zcn	|- ( N e. ZZ -> N e. CC )

Proof

Step	Hyp	Ref	Expression
1		zre	|- ( N e. ZZ -> N e. RR )
2	1	recnd	|- ( N e. ZZ -> N e. CC )