Leetcode/LengthOfLastWord.java at main · mervesaltik/Leetcode · GitHub

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/* Given a string s consisting of words and spaces, return the length of the last word in the string.
 * A word is a maximal substring consisting of non-space characters only.
 *
 * Example 1 : Input : s = "Hello World"
 * Output: 5
 * Explanation: The last word is "World" with length 5.
 *
 * Example 2 : Input: s = "   fly me   to   the moon  "
 * Output: 4
 * Explanation: The last word is "moon" with length 4.
 *
 * Example 3 : Input: s = "luffy is still joyboy"
 * Output: 6
 * Explanation: The last word is "joyboy" with length 6.*/

class LengthOfLastWord {

    public int lengthOfLastWord(String s) {

        int lengthOfLastWord = 0;

        for(int i = s.length()-1; i >= 0; i--) {

            if(s.charAt(i) != ' ') {
                lengthOfLastWord++;

            }else{
                if(lengthOfLastWord > 0){
                    return lengthOfLastWord;

                }
            }
        }

        return lengthOfLastWord;
    }

}