Reverse a String
Check if a String is a Palindrome
Remove Duplicates from a String
Find the First Non-Repeating Character
Count the Occurrences of Each Character
Reverse Words in a Sentence
Check if Two Strings are Anagrams
Find the Longest Substring Without Repeating Characters
Convert a String to an Integer (atoi Implementation)
Compress a String (Run-Length Encoding)
Find the Most Frequent Character
Find All Substrings of a Given String
Check if a String is a Rotation of Another String
Remove All White Spaces from a String
Check if a String is a Valid Shuffle of Two Strings
Convert a String to Title Case
Find the Longest Common Prefix
Convert a String to a Character Array
Replace Spaces with %20 (URL Encoding)