=== Program ===
// copied from K: tests/diverse/collatz.simple
// Program testing Collatz' conjecture up to a user-provided number.

function collatz(n) {
  var s=0;
  print("Testing Collatz' conjecture for n = ",n," ... ");
  while (n > 1) {
    s = s+1;
    if (n == (n/2)*2) { n = n/2; }
    else { n = 3*n+1; }
  }
  print("Done! It took ",s," steps.\n");
}

function main() {
  print("Testing Collatz' conjecture up to what number? ");
  var m = read();
  for (var i=1; i<=m; ++i) { collatz(i); }
  print("Done.  It appears to hold.\n");
}
=== Output ===
Result:
null-value

Output Entity: standard-out
"Testing Collatz' conjecture up to what number? ","Testing Collatz' conjecture for n = ",1," ... ","Done! It took ",0," steps.\n","Testing Collatz' conjecture for n = ",2," ... ","Done! It took ",1," steps.\n","Testing Collatz' conjecture for n = ",3," ... ","Done! It took ",7," steps.\n","Testing Collatz' conjecture for n = ",4," ... ","Done! It took ",2," steps.\n","Testing Collatz' conjecture for n = ",5," ... ","Done! It took ",5," steps.\n","Done.  It appears to hold.\n"