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This approach involves trimming any trailing spaces from the string, splitting it into words using spaces as delimiters, and then simply returning the length of the last word in the resulting list of words.
Time Complexity: O(n), where n is the length of the string.
Space Complexity: O(1), no extra space is used besides counters.
1function lengthOfLastWord(s) {
2 let words = s.trim().split(' ');
3 return words[words.length - 1].length;
4}
5
6console.log(lengthOfLastWord("Hello World")); // Outputs 5The JavaScript approach trims the trailing spaces, splits the string, and then returns the length of the last word in the list.
The Java solution uses a similar reverse traversal but efficiently returns the length of the last word.