algorithm - How do I check if a program terminates? -

Is there a general rule that can be used to determine it? Ex:

  int i = 10; While (i> 1) {if (i% 2 == 0) i = i / 2; And I = 3 * i - 1; }  

This is There are no algorithms present, which you ask.

Specifically, if such an algorithm was there, then, in your question related to the function, would be trivial (or at least too easy).