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Follow the values
Contributed by StemPy LabTry it on paper first. A hint, the key idea and the worked solution are here when you need them.
What does this program show?
Need a reminder? The key ideaShow
Copying a value into b does not tie b to a. Later changes to a do not change b.
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.
Follow the program one line at a time.
x = 10, so the firstprint(x)shows10.x = x - 4takes the old value10, subtracts4and stores6. The secondprint(x)shows6.a = 5. Thenb = acopies the value5intob.a = 9changes onlya. The variablebstill holds5.print(a, b)shows9 5.
Answer: 10, 6 and 9 5.
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