Metamath Proof Explorer

Theorem nnrei

Description: A positive integer is a real number. (Contributed by NM, 18-Aug-1999)

Ref Expression
Hypothesis nnre.1 
|- A e. NN
Assertion nnrei 
|- A e. RR

Proof

Step Hyp Ref Expression
1 nnre.1 
 |-  A e. NN
2 nnre 
 |-  ( A e. NN -> A e. RR )
3 1 2 ax-mp 
 |-  A e. RR