regex numbers only dart
RegExp _regExp = RegExp(r'^[0-9]+$');
_regExp.hasMatch(number);regex numbers only dart
RegExp _regExp = RegExp(r'^[0-9]+$');
_regExp.hasMatch(number);dart regex to have at least one integer
r'(^(?=.*\d))'
// For 6 to 20 use this:
r'(^(?=.*\d).{6,20}$)'Copyright © 2021 Codeinu
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