Golang : Check if password length meet the requirement


Tags : golang password length

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



Tags : golang password length

By Adam Ng

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