Grokking the Art of Recursion for Coding Interviews
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Solution: 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.

Examples:

Sr#ArrayInput KeyOutputDescription
1[2, 4, 6, 8, 4]42The key element 4 occurs twice in the array.

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