Flutter SDK installation - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is the Flutter SDK?

The Flutter SDK is a set of tools and libraries that helps you build mobile apps with Flutter. It includes the Flutter framework, command-line tools, and the Dart programming language.

beginner

Which operating systems are supported for Flutter SDK installation?

Flutter SDK supports Windows, macOS, and Linux for development. You can install and run Flutter on any of these systems.

beginner

What is the purpose of the 'flutter doctor' command?

The 'flutter doctor' command checks your system for any missing dependencies or setup issues needed to run Flutter apps. It helps you fix problems before starting development.

beginner

Why do you need to add Flutter to your system PATH?

Adding Flutter to your system PATH lets you run Flutter commands from any terminal window without typing the full path to the Flutter folder.

beginner

What is the recommended way to install Flutter SDK on Windows?

Download the Flutter SDK zip file from the official website, extract it to a folder like C:\src\flutter, and then add the 'flutter\bin' folder to your system PATH.

Which command checks your Flutter installation for missing dependencies?

A flutter update

B flutter doctor

C flutter check

D flutter install

The 'flutter doctor' command scans your system and reports any missing tools or setup issues.

On which OS can you install the Flutter SDK?

A Windows only

B Linux only

C Windows, macOS, and Linux

D macOS only

Flutter supports installation on Windows, macOS, and Linux.

Why add Flutter to your system PATH?

A To run Flutter commands from any terminal

B To speed up app compilation

C To install Flutter plugins

D To update Flutter automatically

Adding Flutter to PATH lets you run commands like 'flutter run' from any terminal window.

What file do you download to install Flutter SDK?

A An installer .exe file

B A .dmg file

C A .tar.gz file only

D A zip archive

Flutter SDK is downloaded as a zip archive that you extract to a folder.

Which programming language comes bundled with Flutter SDK?

A Dart

B Kotlin

C Java

D Swift

Flutter uses Dart language, which is included in the SDK.

Explain the steps to install Flutter SDK on your computer.

Think about downloading, setting environment variables, and verifying installation.

Why is running 'flutter doctor' important after installing Flutter SDK?

It’s like a health check for your Flutter setup.

Practice

1. What is the first step when installing the Flutter SDK on your computer?

easy

A. Run flutter doctor command

B. Download the Flutter SDK from the official website

C. Add Flutter to the PATH environment variable

D. Extract the Flutter SDK zip file

Solution

1. Step 1: Identify the initial installation step

   The first thing to do is to get the Flutter SDK by downloading it from the official Flutter website.

2. Step 2: Understand the sequence of installation

   After downloading, you extract the files and then add Flutter to your PATH before running commands.

3. Final Answer:

   Download the Flutter SDK from the official website -> Option B

4. Quick Check:

   First step = Download SDK [OK]

Hint: Always start by downloading the SDK from flutter.dev [OK]

Common Mistakes:

• Trying to run flutter commands before downloading
• Adding PATH before extracting files
• Skipping the download step

2. Which command verifies if the Flutter SDK is installed correctly?

easy

A. flutter setup

B. flutter install

C. flutter run

D. flutter doctor

Solution

1. Step 1: Recall the verification command

   The command flutter doctor checks your installation and environment setup.

2. Step 2: Differentiate from other commands

   Other commands like flutter run start apps, but do not verify installation.

3. Final Answer:

   flutter doctor -> Option D

4. Quick Check:

   Verification command = flutter doctor [OK]

Hint: Use flutter doctor to check setup status [OK]

Common Mistakes:

• Using flutter install which does not exist
• Confusing flutter run with verification
• Trying flutter setup which is not a valid command

3. After downloading and extracting Flutter SDK on Windows, what is the correct way to add Flutter to your PATH environment variable?

medium

A. Add the full path to the bin folder inside the extracted Flutter directory

B. Add the path to the Flutter root folder without bin

C. Add the path to the cache folder inside Flutter directory

D. Add the path to the flutter_tools folder

Solution

1. Step 1: Understand Flutter PATH requirements

   Flutter commands are inside the bin folder, so that folder must be in PATH.

2. Step 2: Eliminate incorrect folders

   Adding root or other folders like cache or flutter_tools will not allow command line access.

3. Final Answer:

   Add the full path to the bin folder inside the extracted Flutter directory -> Option A

4. Quick Check:

   PATH must include Flutter's bin folder [OK]

Hint: PATH must point to Flutter's bin folder for commands [OK]

Common Mistakes:

• Adding Flutter root folder instead of bin
• Adding cache or flutter_tools folders
• Not updating PATH after extraction

4. You ran flutter doctor but it shows Flutter command not found. What is the most likely cause?

medium

A. Flutter SDK path was not added to the PATH environment variable

B. Flutter SDK version is outdated

C. Flutter SDK was extracted incorrectly

D. Flutter SDK was not downloaded

Solution

1. Step 1: Analyze the error message

   "Flutter command not found" means the system cannot locate the flutter executable.

2. Step 2: Identify common causes

   This usually happens if the PATH variable does not include the Flutter bin folder.

3. Final Answer:

   Flutter SDK path was not added to the PATH environment variable -> Option A

4. Quick Check:

   Command not found = PATH missing Flutter bin [OK]

Hint: Check if Flutter bin folder is in PATH when command not found [OK]

Common Mistakes:

• Assuming download failed without checking PATH
• Ignoring PATH update after extraction
• Thinking outdated version causes command not found

5. You want to install Flutter SDK on macOS and ensure you can run Flutter commands from any terminal window. Which sequence of steps is correct?

hard

A. Extract Flutter SDK zip, add flutter/bin to PATH, download Flutter SDK zip, then run flutter doctor

B. Download Flutter SDK zip, run flutter doctor, extract it, add flutter/bin to PATH

C. Download Flutter SDK zip, extract it, add flutter/bin to PATH in ~/.zshrc, then run flutter doctor

D. Add flutter/bin to PATH, download Flutter SDK zip, extract it, then run flutter doctor

Solution

1. Step 1: Follow the correct installation order

   First, download the Flutter SDK zip file, then extract it to a folder.

2. Step 2: Update PATH before running Flutter commands

   Add the flutter/bin folder path to your shell config file like ~/.zshrc so commands work in any terminal.

3. Step 3: Verify installation

   Finally, run flutter doctor to check the setup.

4. Final Answer:

   Download Flutter SDK zip, extract it, add flutter/bin to PATH in ~/.zshrc, then run flutter doctor -> Option C

5. Quick Check:

   Download -> Extract -> PATH -> flutter doctor [OK]

Hint: On macOS, update PATH in ~/.zshrc after extracting SDK [OK]

Common Mistakes:

• Running flutter doctor before extraction
• Not adding flutter/bin to PATH
• Adding PATH before downloading SDK