Difficulty: Easy
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.
Example:
Input: "Hello World"
Output: 5
Language: Java
class Solution {
public int lengthOfLastWord(String s) {
if (s == null) {
return 0;
}
s = s.trim();
char[] chars = s.toCharArray();
int length = 0;
for (int i = chars.length - 1; i >= 0; i--) {
if (chars[i] != ' ') {
length++;
} else {
break;
}
}
return length;
}
}