// Easiest way to create loops are "misusing" the call stack!
// That is instead of creating "real" loops in SLC or labels and GOTOs,
// we can have a word (loop) that basically calls to its own code location.

// A do-while loop is then as follows:

loop
....
if(feltétel) { ret } [ endloop ]


// A while-loop is then as follows:

loop if(feltétel) {
...
ret
} endloop

// Rem.: "ret" is literally the written-out word for returning; endloop is "removing" (and throwing away) call stack top.
// Rem.: This does not make "loops into recursion" because the stack does not grow while loop is going on!