Custom inquiry Numbers | WordPress.org

Hello @tsubakuma

Thank you very much for using our plugin.

In short, you want to generate a random number starting with “E-” followed by seven digits.

Insert a calculated field in the form and enter the following code as its equation:

(function() {
  let digits="0123456789", result = "E-";
  for (var i = 7; i > 0; --i) {
    result = CONCATENATE(result, digits[ROUND(RANDOM() * (digits.length - 1))]);
  }
  return result
})()

Best regards.