Metamath Proof Explorer

Theorem nn0red

Description: A nonnegative integer is a real number. (Contributed by Mario Carneiro, 27-May-2016)

Ref Expression
Hypothesis nn0red.1 
|- ( ph -> A e. NN0 )
Assertion nn0red 
|- ( ph -> A e. RR )

Proof

Step Hyp Ref Expression
1 nn0red.1 
 |-  ( ph -> A e. NN0 )
2 nn0ssre 
 |-  NN0 C_ RR
3 2 1 sseldi 
 |-  ( ph -> A e. RR )