7. Number Frequency

Grokking the Art of Recursion for Coding Interviews

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7. Number Frequency

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Problem Statement

Write a Recursive Solution to Count occurrences of an Element in an Array.

Given an array of integers and a key element, write a recursive solution to count the occurrences of the key element in the array.

Sr#	Array	Input Key	Output	Description
1	[2, 4, 6, 8, 4]	4	2	The key element 4 occurs twice in the array.
2	[1, 3, 5, 7, 9]	2	0	The key element 2 does not exist in the array.
3	[1, 2, 2, 2, 3]	2	3	The key element 2 occurs three times in the array.

Try solving this question here:

Python3

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