How to remove the last character of a string in Golang?

Question

I want to remove the very last character of a string, but before I do so I want to check if the last character is a "+". How can this be done?

Answer 1

Here are several ways to remove trailing plus sign(s).

package main  import (     "fmt"     "strings" )  func TrimSuffix(s, suffix string) string {     if strings.HasSuffix(s, suffix) {         s = s[:len(s)-len(suffix)]     }     return s }  func main() {     s := "a string ++"     fmt.Println("s: ", s)      // Trim one trailing '+'.     s1 := s     if last := len(s1) - 1; last >= 0 && s1[last] == '+' {         s1 = s1[:last]     }     fmt.Println("s1:", s1)      // Trim all trailing '+'.     s2 := s     s2 = strings.TrimRight(s2, "+")     fmt.Println("s2:", s2)      // Trim suffix "+".     s3 := s     s3 = TrimSuffix(s3, "+")     fmt.Println("s3:", s3) } 

Output:

s:  a string ++ s1: a string + s2: a string  s3: a string + 

Answer 2

Based on the answer of @KarthikGR the following example was added:

https://play.golang.org/p/ekDeT02ZXoq

package main  import (     "fmt"     "strings" )  func main() {     fmt.Println(strings.TrimSuffix("Foo++", "+")) } 

returns:

Foo+