Fibonacci numbers in Io

Example for versions Io-2008-01-07

This example uses iterative definition of Fibonacci numbers. for loop misses fourth parameter which sets loop step — it defaults to 1, so no need to set it explicitly. 

N0 := 0;
N1 := 1;
for(i,1,16,
   N2 := N1+N0;
   N0 := N1;
   N1 := N2;
   N0 print;
   ", " print;
);
"..." println;