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Love Calculator (Error)

Error in firstname and secondname.  Main.dart import   'package:flutter/material.dart' ; import   'calculation.dart' ; void   main ()   {    runApp ( MyApp ()); } class   MyApp   extends   StatelessWidget   {    @override    Widget   build ( BuildContext   context )   {      return   MaterialApp (        title :   'Love Calculator' ,        home :   MyCalculator (),      );    } } class   MyCalculator   extends   StatefulWidget   {    @override    _MyCalculatorState   createState ()  =>  _MyCalculatorState (); } class   _MyCalculatorState   extends   State < MyCalculator >   {    String   firstName   =   "" ;    String   secondName   =   "...
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Sign Up Form (Error)

main.dart import   'package:flutter/material.dart' ; import   'SignUpPage.dart' ; void   main ()  =>  runApp ( MyApp ()); class   MyApp   extends   StatelessWidget   {    const   MyApp ({ Key ?   key })   :   super ( key :   key );    @override    Widget   build ( BuildContext   context )   {      return   MaterialApp (        title :   'User Details' ,        debugShowCheckedModeBanner :   false ,        theme :   ThemeData . dark (),        home :   SignUpPage (),      );    } } SignUpPage.dart Error in strings and input import   'package:flutter/material.dart' ; import   'HomePage.dart' ; import   'https://flutlab.io/root/app/lib/HomePage.dart' ; class ...
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How to call API (Error)

 main.dart import   'package:flutter/material.dart' ; import   'HomePage.dart' ; void   main ()  =>  runApp ( MyApp ()); class   MyApp   extends   StatelessWidget   {    const   MyApp ({ Key ?   key })   :   super ( key :   key );    @override    Widget   build ( BuildContext   context )   {      return   MaterialApp (        title :   'Github App' ,        theme :   ThemeData (          primarySwatch :   Colors . deepPurple ,        ),        home :   HomePage ( title :   'Parse JSON Data' ),      );    } } HomePage.dart Error is in getjsondata() in uri  import   'package:flutter/material.dart' ; import ...
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