To answer this question, let's go through each option to understand why it is correct or incorrect:
Option A) 5 - This option is correct because the variable x
in the main
function is passed by value to the change
function. In the change
function, the value of x
is updated to 7, but this change does not affect the original x
variable in the main
function. Therefore, the value of x
in the main
function remains 5, and that is the value that is printed.
Option B) 7 - This option is incorrect because the value of x
in the change
function is updated to 7, but this change does not affect the original x
variable in the main
function. Therefore, the value of x
in the main
function remains 5, not 7.
Option C) 9 - This option is incorrect because nowhere in the program is there a statement that assigns the value 9 to the variable x
.
Option D) unknown - This option is incorrect because the behavior of the program is well-defined. The output will be a specific value, either 5 or 7, depending on the correct choice among the given options.
The correct answer is A) 5. This option is correct because, as explained earlier, the value of x
in the main
function remains 5, and that is the value that is printed.
Therefore, the correct answer is A) 5.