How to check the given value is a number or not in dart?

dart provided double.tryParse() function which will return null if the given value is not a number otherwise it returns a given number.

so based on this feature we can check given value is a Number or not by the following code.

bool _isNumeric(String result) {

if (result == null) {

return false;

}

return double.tryParse(result) != null;

}

How do I open a web browser (URL) from my Flutter code?

How do i make CachedNetwork image as rounded circle in flutter?

How to copy text from Text Widget flutter?

What corresponds to Intent in Flutter?

How to create Gradient background for AppBar in Flutter

Fix Flutter Bottom Overflowed Error in Your App - RRutors

How to create Toast in Flutter?

How do i make circular icon Inside Button ?

How do I supply/set an initial value to a text field in Flutter ?

What is Flutter?

Can we use Container color and decoration properties at once?

How do we save the data in browser's cookies using the Flutter web?

How to handle the code after showDialog is dismissed in Flutter?

How do i make TextButton full width in flutter?

How to change package name in flutter?

How to remove Yellow lines under Text Widgets in Flutter?

Flutter Questions and Answers

How to Close Flutter application Programmatically?

Fix Navigator Context Issue in Flutter with RRutors

How to convert a String value to double in flutter?

How to navigate to new screen without back screen

Fix Scaffold.of() Called Without Scaffold Exception - RRutors

Fix MissingPluginException Error in Flutter with RRutors

Flutter - Vertical Divider - How to add Vertical Divider?

How to make shadow for Container widget Flutter?

How to change the application launcher icon on Flutter?

How does Flutter load images?

How to display snackbar infinite duration in a flutter application

How to remove debug banner in flutter?

How to make a widget Center vertically inside a SingleChildScrollView

How to set the TextFormField/TextField border color

How to deactivate back button in flutter?

How can i get document id in Flutter Firestore?

Fix Flutter Null Safety Issue with RRutors

OS Error: A required privilege is not held by the client errno = 1314

How to place a listview inside a SingleChildScrollView but prevent them from scrolling separately?