Update README.md

Author: LavanyaA

README.md

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-# render_chart_with_json_data_flutter_charts
-Renders Flutter Cartesian Charts with JSON data
+# Renders Flutter Cartesian Charts with JSON data
+
+A quick-start example to help you add the Syncfusion Flutter Charts package to a Flutter app. You will learn how to add a Cartesian chart to a Flutter project. You will then learn how to render flutter chart using json data. Using the deserialization concept, you can convert the JSON data to Dart list object and use that deserialized list object as chart data for Flutter Cartesian chart. The parsing of raw JSON data to dart object model is called deserialization.
+
+## Requirements to run the demo
+* [VS Code](https://code.visualstudio.com/download)
+* [Flutter SDK v2.0.0+](https://flutter.dev/docs/development/tools/sdk/overview)
+* [For more development tools](https://flutter.dev/docs/development/tools/devtools/overview)
+
+## How to run this application
+To run this application, you need to first clone or download the ‘render chart with json data flutter charts’ repository and open it in your preferred IDE. Then, build and run your project to view the output.
+
+## Further help
+For more help, check the [Syncfusion Flutter documentation](https://help.syncfusion.com/flutter/introduction/overview), or
+ [Flutter documentation](https://flutter.dev/docs/get-started/install).