Upgrade & Secure Your Future with DevOps, SRE, DevSecOps, MLOps!

We spend hours on Instagram and YouTube and waste money on coffee and fast food, but won’t spend 30 minutes a day learning skills to boost our careers.
Master in DevOps, SRE, DevSecOps & MLOps!

Learn from Guru Rajesh Kumar and double your salary in just one year.



Get Started Now!

Flutter: Conditional Statements If-Else

The if-else statement is a fundamental construct in programming that allows you to execute different blocks of code based on specific conditions. In Flutter, if-else statements are used extensively to control the flow of your application’s logic and user interface.

Syntax of If-Else Statements in Dart (Flutter’s Programming Language):

The syntax of an if-else statement in Dart is as follows.

if (condition) {
  // Code to execute if the condition is true
} else {
  // Code to execute if the condition is false
}

In this syntax:

  • condition is a boolean expression that evaluates to either true or false.
  • The code block inside the if statement is executed if the condition is true.
  • The code block inside the else statement is executed if the condition is false.

Example: Using If-Else Statements in Flutter Widgets:

Let’s consider a simple example where we want to display a message based on whether a user is logged in or not. We can achieve this using if-else statements in Flutter widgets.

import 'package:flutter/material.dart';

class HomePage extends StatelessWidget {
  final bool isLoggedIn = true;

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Conditional Statements in Flutter'),
      ),
      body: Center(
        child: isLoggedIn
            ? Text('Welcome, User!')
            : Text('Please log in to continue.'),
      ),
    );
  }
}

void main() {
  runApp(MaterialApp(
    home: HomePage(),
  ));
}

We define a boolean variable isLoggedIn that determines whether the user is logged in.

Inside the build method of the HomePage widget, we use an if-else statement to conditionally display different messages based on the value of isLoggedIn.

If isLoggedIn is true, we display a welcome message. Otherwise, we prompt the user to log in.

Related Posts

How We Fixed “sonar-scanner: command not found” and Successfully Analyzed Our Project with SonarQube

Running static code analysis with SonarQube is essential for maintaining clean, quality code. Recently, while working on our Laravel microservice project mhn-doctors-ms, we hit a common yet…

Is SonarQube Community free Edition Good for Laravel Projects?

When working on web development projects using Laravel, JavaScript, and jQuery, maintaining code quality becomes just as important as building features. That’s where tools like SonarQube come…

Laravel Throttle Middleware: How to Increase API Rate Limit Safely and for 429 Too Many Requests

If you’re working with Laravel APIs, you might have encountered this default throttle setting: This line lives in your app/Http/Kernel.php file and controls how many requests a…

Fixing MySQL Error: Incorrect Definition of mysql.column_stats Table

The Problem While working on your MySQL server, you might come across this error in your error log: This error usually shows up after an upgrade or…

Fixing Laravel Migration Error: “Unknown Collation: utf8mb4_0900_ai_ci”

While working with Laravel and MySQL, you might run into an error during migrations like this one: Why This Happens The collation utf8mb4_0900_ai_ci is introduced in MySQL…

Why Dental Surgery Is Good and Important

Dental health plays a vital role in our overall well-being, yet it’s often overlooked until problems become serious. Dental surgery is a powerful solution that not only…

5 2 votes
Article Rating
Subscribe
Notify of
guest
0 Comments
Inline Feedbacks
View all comments
0
Would love your thoughts, please comment.x
()
x