58. Length of Last Word

1. Question

Given a string s consisting of some words separated by some number of spaces, return the length of the last word in the string.

A word is a maximal substring consisting of non-space characters only.

2. Examples

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.

3. Constraints

• 1 <= s.length <= 10⁴
• s consists of only English letters and spaces ' '.
• There will be at least one word in s.

4. References

来源：力扣（LeetCode） 链接：https://leetcode-cn.com/problems/length-of-last-word 著作权归领扣网络所有。商业转载请联系官方授权，非商业转载请注明出处。

5. Solutions

class Solution {
    public int lengthOfLastWord(String s) {
        s = s.trim();
        return s.length() - s.lastIndexOf(' ') - 1;
    }
}