ATM PIN Code Validation

Published by Николай in
regexvalidation

ATM machines allow 4 or 6 digit PIN codes and PIN codes cannot contain anything but exactly 4 digits or exactly 6 digits. Your task is to create a function that takes a string and returns true if the PIN is valid and false if it's not.

Examples

ValidatePIN("1234") ➞ true

ValidatePIN("12345") ➞ false

ValidatePIN("a234") ➞ false

ValidatePIN("") ➞ false

Notes

  • Some test cases contain special characters.
  • Empty strings must return false.
Watch a quick demo on how Edabit works.