# Question

Formatted question description: https://leetcode.ca/all/58.html

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.



# Algorithm

Preprocess the input string first, remove the spaces at the beginning and the end, and then use a counter to accumulate the length of the non-space string, and clear the counter when it encounters a space.

Java