Method lengthOfLastWord

58-length-of-last-word/Solution.java:2–18

(String s)

public class Solution {
    public int lengthOfLastWord(String s) {
        int n = s.length() - 1;
        int length = 0;

        // Step 1-> skip trailing spaces
        while (n >= 0 && s.charAt(n) == ' ') {
            n--;
        }

        // Step 2-> count last word length
        while (n >= 0 && s.charAt(n) != ' ') {
            length++;
            n--;
        }

        return length;
    }
}