String Reversal
You are a puzzle enthusiast solving a series of riddles that involve reversing strings. Each riddle provides a string, and you need to write a function to reverse the string to reveal the answer.
Write a function named reverseString that takes one parameter str that you need to reverse. Return the reversed string.
Follow Up: Try doing without any built-in functions.
Example 1
Input: reverseString("hello");
Output: "olleh"
Example 2
Input: reverseString("12345");
Output: "54321"
Example 3
Input: reverseString("");
Output: ""
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