Golang : Check if password length meet the requirement




Problem :

You need to check the password's length entered by users. How to do that in Golang?

Solution :

Use the builtin len() function to evaluate the length of the password and return true if the password length is acceptable or false if not.

See example :

 package main

 import "fmt"

 func checkLength(value string, min, max int) bool {
  pwdLen := len(value)
  if min > 0 && pwdLen < min {
 return false
  }
  if max > 0 && pwdLen > max {
 return false
  }
  return true
 }

 func main() {

  password := "abc12"
  passwordMin := 6
  passwordMax := 20

  if !checkLength(password, passwordMin, passwordMax) {
 fmt.Println("Password needs to be more than 6 characters and less than 20 characters")
  } else {
 fmt.Println("Password length accepted")
  }

  password = "abc1234"

  if !checkLength(password, passwordMin, passwordMax) {
 fmt.Println("Password needs to be more than 6 characters and less than 20 characters")
  } else {
 fmt.Println("Password length accepted")
  }
 }

Sample output :

Password needs to be more than 6 characters and less than 20 characters

Password length accepted





By Adam Ng

IF you gain some knowledge or the information here solved your programming problem. Please consider donating to the less fortunate or some charities that you like. Apart from donation, planting trees, volunteering or reducing your carbon footprint will be great too.


Advertisement