LeetCode in TypeScript
58. Length of Last Word
Easy
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.
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
function lengthOfLastWord(s: string): number {
let len = 0
for (let i = s.length - 1; i >= 0; i--) {
const ch = s[i]
if (ch === ' ' && len > 0) {
break
} else if (ch !== ' ') {
len++
}
}
return len
}
export { lengthOfLastWord }