Length of Last Word

Desicription

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:

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Input: "Hello World"
Output: 5

Solution

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class Solution {
public:
int lengthOfLastWord(string s) {
int len = 0;
for(int i = 0; s[i];){
if(s[i++] != ' ')
len++;
else if(s[i] && s[i] != ' ')
len = 0;
}
return len;
}
};