Erlang多重表达式

-module(helloworld). 
-export([start/0]). 

start() -> 
   A = 5, 
   B = 6, 
   if 
      A == B -> 
         io:fwrite(A is equal to B); 
      A < B -> 
         io:fwrite(A is less than B); 
      true -> 
         io:fwrite(False) 
   end.