Regex for IBAN Number

javascript

const regex = /^[A-Z]{2}\d{2}[A-Z0-9]{4}\d{7}(?:[A-Z0-9]?){0,16}$/;
const isValid = regex.test(value);

python

import re
pattern = r'^[A-Z]{2}\d{2}[A-Z0-9]{4}\d{7}(?:[A-Z0-9]?){0,16}$'
if re.match(pattern, value):
    print("valid")

ruby

pattern = /^[A-Z]{2}\d{2}[A-Z0-9]{4}\d{7}(?:[A-Z0-9]?){0,16}$/
if value =~ pattern
  puts "valid"
end

php

if (preg_match('/^[A-Z]{2}\d{2}[A-Z0-9]{4}\d{7}(?:[A-Z0-9]?){0,16}$/', $value)) {
    echo "valid";
}

java

String pattern = "^[A-Z]{2}\\d{2}[A-Z0-9]{4}\\d{7}(?:[A-Z0-9]?){0,16}$";
boolean isValid = value.matches(pattern);