RichText_example.dart

import 'package:flutter/material.dart';

void main()
{
  runApp(MyApp());
}

class MyApp extends StatelessWidget
{
  @override
  Widget build(BuildContext context)
  {
    return MaterialApp(
        home: MyHomePage()
    );
  }
}

class MyHomePage extends StatelessWidget
{
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('RichText Example'),
        backgroundColor: Colors.purple,
      ),
      body: Padding(
        padding: EdgeInsets.all(10.0),
        child: Center(
          child: RichText(
            text: TextSpan(
              text: 'DeveloperXon provides you ',
              style: TextStyle(color: Colors.black, fontSize: 20),
              children: const <TextSpan>[
                TextSpan(text: 'tutorials ', style: TextStyle(fontWeight: FontWeight.bold)),
                TextSpan(text: 'on '),
                TextSpan(text: 'web and mobile ', style: TextStyle(fontWeight: FontWeight.bold,color: Colors.blue)),
                TextSpan(text: 'development.'),
              ],
            ),
          )
      ),
    )
    );
  }
}