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Flutter is an open-source framework known as a UI tool kit to develop high-quality and high-performance applications. Flutter is used for creating efficient mobile applications for Android and iOS mobile operating systems. It is popular for creating applications due to its simple, efficient, powerful, easy-to-understand SDK used for developing mobile applications using Google’s language called Dart. 

Google developed Flutter, and now it is managed by ECMA standards. Flutter is free for use. Creating mobile applications is a slightly complex method. Android uses different frameworks and languages for its applications than iOS. Thus, it becomes complicated and challenging to develop various applications using two other frameworks and programming languages. 

To reduce the complexity, there are many new frameworks developed that support both operating systems. These frameworks are known as cross-platform development tools. The cross-platform development tools allow you to work on a single code that supports both operating systems. It uses the Dart programming language to create applications. Dart has many similar features as other programming languages like Kotlin, Swift. Hence, it enables the Dart programs to be trans-compiled into JavaScript code. 

Flutter is different from the other frameworks. It doesn’t require WebView or OEM. Instead, it utilizes its high-performance rendering engine to draw widgets. It also updates most of its systems like widgets, gestures, animations, and more. These implementations using Dart allows the developer to read, change, replace, or remove things easily. Hence, it provides complete control of the system to the developers. 

Features of Flutter include:

• Open-source
• Cross-platform
• Hot Reload
• Accessible Native Features and SDKs
• Minimal code
• Widgets

Advantages of Flutter include:

• Due to its hot reload feature, the development of applications is faster. Any changes are reflected as soon as the code is changed or updated.
• It allows a smoother scrolling experience than other frameworks, which makes running applications faster.
• Testing time is reduced as testers do not repeatedly test the same tests on different platforms as Flutter is cross-platformed.
• It has an excellent UI due to its high development tools, advanced APIs, design-centric widgets, and more.
• The UI content gets automatically updated, similar to the reactive framework.
• The development process is faster and is cross-platformed. It is suitable for the development of MVP(Minimum Viable Product) apps.

Through Flutter:

• You can build Layouts.
• You can add interactivity to your app.
• You can add animations.
• You can Internationalize the apps.

Dart is an open-source general-purpose programming language that Google developed. It is an object-oriented programming language that has C-style syntax. Dart supports interfaces and classes but doesn’t support arrays as most of the other programming languages do. Dart collections can be utilized for replicating data structures. 

A simple example of Dart program is:
Void main() {
print(“Dart is developed by Google!”);
}
 

Dart supports the following data types:

• Numbers
• Strings
• Booleans
• Lists and Maps
• If the variable type is not defined, then by default, it is set as dynamic

Dart is an object-oriented programming language that supports the creation of classes, interfaces, etc. The definition of class includes:

• Fields
• Getters and Setters
• Constructors
• Functions

In Flutter, you can categorize widgets based on their features:

• Layout Widgets
• Platform Specific Widgets
• State Maintenance Widgets
• Basic Widgets or Platform independent Widgets 

Flutter is fully centric towards widgets as it incorporates a UI layout into widgets itself. You can consider widgets as its core concept. You can find many specifically designed widgets to build a user interface like container, center, align, etc.

To understand Flutter better, get hold of the flutter course free offered by Great Learning. Also, secure Free Flutter Certificates online and use them to grab better job opportunities.