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.
Solution
public class Solution {
public int lengthOfLastWord(String s) {
int res = 0, i = s.length() - 1;
while (i >= 0 && s.charAt(i) == ' ') --i;
while (i >= 0 && s.charAt(i) != ' ') {
--i; ++res;
}
return res;
}
}