Question

How do you create a recursive formula that sums an array of numbers in Java?

A. Iterative Loop
B. Nested Arrays
C. Recursive Function
D. Conditional Statements

Answer 1

To create a recursive function in Java that sums an array, the function calls itself with subsets of the array until the base condition is met. A simple example includes a function that recursively adds the next array element until the first element is reached.

Step-by-step explanation:

To create a recursive formula that sums an array of numbers in Java, you will use a C. Recursive Function. An iterative approach would use a loop, while a recursive function involves the method calling itself with progressively smaller subsets of the array until a base condition is met.

A basic example of a recursive sum function in Java might look like this:

public static int recursiveSum(int[] array, int index) {
if (index <= 0) {
return array[0];
} else {
return array[index] + recursiveSum(array, index - 1);
}
}

You would call this function with recursiveSum(myArray, myArray.length - 1) to sum all elements in myArray. The recursion ends when the index is 0, which is the base case, and the function simply returns the first element of the array.