Regex for SWIFT/BIC Code

javascript

const regex = /^[A-Z]{4}[A-Z]{2}[A-Z0-9]{2}(?:[A-Z0-9]{3})?$/;
const isValid = regex.test(value);

python

import re
pattern = r'^[A-Z]{4}[A-Z]{2}[A-Z0-9]{2}(?:[A-Z0-9]{3})?$'
if re.match(pattern, value):
    print("valid")

ruby

pattern = /^[A-Z]{4}[A-Z]{2}[A-Z0-9]{2}(?:[A-Z0-9]{3})?$/
if value =~ pattern
  puts "valid"
end

php

if (preg_match('/^[A-Z]{4}[A-Z]{2}[A-Z0-9]{2}(?:[A-Z0-9]{3})?$/', $value)) {
    echo "valid";
}

java

String pattern = "^[A-Z]{4}[A-Z]{2}[A-Z0-9]{2}(?:[A-Z0-9]{3})?$";
boolean isValid = value.matches(pattern);