Click on the green flag. It will ask you for a number. The conjecture states that it will always reach one. You can input a number to find out.
The rule is: If even: divide by two (n/2) if odd: times it by three and add one (3n+1) Even though I have a citation below for where I found the Collatz Conjecture, I originally found it in a math book. Collatz conjecture. (2023, November 12). In Wikipedia. https://en.wikipedia.org/wiki/Collatz_conjecture