Regex for USD Currency

javascript

const regex = /^\$?\d{1,3}(,\d{3})*(\.\d{2})?$/;
const isValid = regex.test(value);

python

import re
pattern = r'^\$?\d{1,3}(,\d{3})*(\.\d{2})?$'
if re.match(pattern, value):
    print("valid")

ruby

pattern = /^\$?\d{1,3}(,\d{3})*(\.\d{2})?$/
if value =~ pattern
  puts "valid"
end

php

if (preg_match('/^\$?\d{1,3}(,\d{3})*(\.\d{2})?$/', $value)) {
    echo "valid";
}

java

String pattern = "^\\$?\\d{1,3}(,\\d{3})*(\\.\\d{2})?$";
boolean isValid = value.matches(pattern);