The skip register - page 3

We can also do things like this:

   X , -17 => adder => skip

Here, if X outputs exactly 17, then adding -17 to it will produce a zero from the adder, and no skip will start. But if X outputs anything other than 17, the adder sum will not be zero, skip will be set, and all following instructions (until an end skip) will be skipped.

Thus, for example:

   X , -17 => adder => skip    // begin skipping if X does not equal 17
      A => B ; C => D          // do these only if X equals 17
   0 => skip                   // end skip, resume normal execution

This is the equivalent of:

   if (X == 17) { A => B ; C => D }