Consider the code for the recursive method printSum shown in this code snippet, which is intended to return the sum of digits from 1 to n: Which of the following statements is correct?
A)line #3 is incorrect, and should be changed to return (n + printSum(n + 1));
B)line #1 is incorrect, and should be changed to if (n

Question

Consider the code for the recursive method printSum shown in this code snippet, which is intended to return the sum of digits from 1 to n:  Which of the following statements is correct? 
A)line #3 is incorrect, and should be changed to return (n + printSum(n + 1)); 
B)line #1 is incorrect, and should be changed to if (n <= 1) 
C)line #3 is incorrect, and should be changed to return (n + printSum(n - 1)); 
D)line #3 is incorrect, and should be changed to return (printSum(n - 1));

Quizplus · Accepted Answer

The current implementation of printSum is adding the current value of n to the sum of digits from n+1 to the upper bound, which should be n-1 instead. Therefore, line #3 should be changed to return (n + printSum(n - 1)). Choice A is incorrect because adding n to n+1 would result in skipping a digit. Choice B is incorrect because changing the base case to n=1 would result in excluding 1 from the sum. Choice D is also incorrect because it would not include the current value n in the sum.

Consider the Code for the Recursive Method PrintSum Shown in This