LeetCode – 58. Length of Last Word

Given a string s consists of upper/lower-case alphabets and empty space characters ' ', return the length of last word in the string.

If the last word does not exist, return 0.

Note: A word is defined as a character sequence consists of non-space characters only.

For example,
Given s = 'Hello World',
return 5.

public class Solution { public int lengthOfLastWord(String s) { int len = s.length(); int result = 0; while(len>0){ if(s.charAt(len-1) != ' '){ len--; result ++; } else{ if(result == 0 && len>0){ len --; } else{ return  result; } } } return  result; } }