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Take a number. If it is even, halve it. If it is odd, multiply it by 3 and add 1…
Contributed by StemPy LabTry it on paper first. A hint, the key idea and the worked solution are here when you need them.
Take a number. If it is even, halve it. If it is odd, multiply it by and add . Repeat until you reach . How many steps does it take from ?
Need a reminder? The key ideaShow
Repeat while n is not 1, and use if and else inside the loop.
The worked solution
Have you tried it?
Work it out on paper first. It is fine to get stuck or make a mistake: that is how we learn. When you are ready, compare your working with the solution.
Plan. A while loop that stops when n is 1.
That is steps.
Answer: steps. (Nobody knows if every starting number reaches 1. It has been checked for very large numbers, but there is no proof.)
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