cardNumberValidate method
This Method will validate your content from ATM/Credit Card Number Format.
content
Content is a Required parameter. Pass your inputed or that value which you want to compare with ATM/Credit Card Number Format.
length
Length of card number.
Implementation
bool cardNumberValidate({required String content, int? length}) {
if (content.length != length) {
return false;
} else {
return RegExp(r"^[0-9][16]").hasMatch(content);
}
}