Category Archives: Flutter Tutorials
Flutter Dart Find Calculate Square Root of Given Number Example
Flutter Dart Convert String to Double Float Android iOS Example
Flutter Dart Check Entered String Value is Number or Not Example

In dart there is a inbuilt function named as _isNumeric() which is Boolean type return value function. Using the _isNumeric(String) function we can easily check whether the entered value in TextField widget is numeric or not. The _isNumeric() function would return true if the value is numbered and return false…