LeetCode-in-Go
58. Length of Last Word
Easy
Given a string s consisting of words and spaces, return the length of the last word in the string.
A word is a maximal substring consisting of non-space characters only.
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.
Constraints:
1 <= s.length <= 104sconsists of only English letters and spaces' '.- There will be at least one word in
s.
Solution
func lengthOfLastWord(s string) int {
length := 0
for i := len(s) - 1; i >= 0; i-- {
ch := s[i]
if ch == ' ' && length > 0 {
break
} else if ch != ' ' {
length++
}
}
return length
}