integer save into single bytes

Using Arduino Programming Questions
20

Hi,
if you are trying to convert from byte array to long integer, simply use the union in the opposite way:

   Number Out;

   Out.barray[0] = b0;
   Out.barray[1] = b1;
   Out.barray[2] = b2;
   Out.barray[3] = b3;

   unsigned long val = Out.num