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Flutter Dart Programming

Syntax

Dart code can be written in any text editor and then compiled using the Dart SDK. The syntax for Dart programming is similar to that of Java and C#, with a few differences. Here's an example of basic syntax in Dart:

void main() {
  String greeting = "Hello world!";
  print(greeting);
}

Example

Let's say we want to write a program that takes two numbers as inputs and outputs their sum. Here's the code for that in Dart:

import 'dart:io';

void main() {
  stdout.write("Enter the first number: ");
  int num1 = int.parse(stdin.readLineSync()!);

  stdout.write("Enter the second number: ");
  int num2 = int.parse(stdin.readLineSync()!);

  int sum = num1 + num2;
  print("The sum is: $sum");
}

Output

When running the above program, the output will look like:

Enter the first number: 5
Enter the second number: 3
The sum is: 8

Explanation

In the above example, we imported the dart:io library to use the stdin and stdout objects which allow us to read and write data respectively. We use stdout.write() to prompt the user for input and stdin.readLineSync() to read in the input as a string which we then convert to an integer using int.parse(). We then add the two numbers together and output the result using print().

Use

Dart and Flutter are commonly used to build cross-platform mobile applications. Dart's simplicity and ease of use make it ideal for building scalable, performant, and maintainable codebases. Flutter provides a powerful toolkit for building visually rich user interfaces that work across iOS, Android and Web platforms.

Important Points

  • Dart is an object-oriented programming language used for developing mobile and web apps.
  • Flutter is a powerful UI toolkit that uses Dart programming language to create stunning applications.
  • Dart is easy to learn and has a concise syntax.
  • Dart code can be compiled ahead-of-time into native code for fast execution on mobile devices.

Summary

Dart programming language is a powerful tool for developers looking to build applications for mobile and web platforms. The simplicity of the syntax and ease of use make it a great choice for developers of all skill levels. Flutter, with its powerful UI toolkit, allows developers to quickly create stunning applications that work across multiple platforms.

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