Count Nested Arrays Recursion Challenge

Given an array, return the total number of arrays nested inside it at any depth. Do not count the outermost input array itself.

Function Signature

countNestedArrays(array)

Parameters

• array — an array that may contain values or nested arrays.

Output

Return a number representing the count of all nested arrays (excluding the input array).

Constraints

• The function must use recursion.
• The input array must not be mutated.
• The function should accept exactly one argument.

Examples

countNestedArrays([])                      → 0
countNestedArrays([1, 2, 3])               → 0
countNestedArrays([1, [2], [3, [4]], 5])   → 3
countNestedArrays([[], [[]], [[[]]]])      → 6