Program for length of the last word in a string in Go (Golang)

Table of Contents

Overview

The objective is to find the length of the last word in a given string

Example

Input: "computer science"
Output: 7
The last word is science and its length is 7
Input: "computer science is a subject "
Output: 7
The last word is subject and ts length is 7
Input: " "
Output: 0
There is no last word hence answer is zero

Program

Here is the program for the same.

package main
import "fmt"
func lengthOfLastWord(s string) int {
lenS := len(s)
lenLastWord := 0
for i := lenS - 1; i >= 0; {
for i >= 0 && string(s[i]) == " " {
i--
}
if i < 0 {
return 0
}
for i >= 0 && string(s[i]) != " " {
//fmt.Println(i)
//fmt.Println(string(s[i]))
i--
lenLastWord++
}
return lenLastWord
}
return 0
}
func main() {
length := lengthOfLastWord("computer science")
fmt.Println(length)
length = lengthOfLastWord("computer science is a subject")
fmt.Println(length)
length = lengthOfLastWord(" ")
fmt.Println(length)
}

Output

7
7
0

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