$3\mathrm{.}22$ Lab: Foreshadowing References

Here, we investigate what happens when we change the value of a variable in a function. Your instructions are to

define a function that takes a single argument, adds $10$ to that argument, and then prints it out $($all inside the function!$)$

then, outside of the function, print out x$,$ call your function using x as its argument, and print out x again

In total, x should be printed out $3$ times. Did you get what you expected? We will explain this behavior later in the course.