flexpath-syntax-variables-data-types-exercises

Exercise overview

The intention of this exercise is to give you more experience the syntax of the JavaScript language and using its data types.

Getting Started

1. Using Visual Studio Code, open the folder flexpath-syntax-variables-data-types-exercises wherever you saved it on your device.
2. Your VS code file explorer window should look like this:
3. Then open up the exercises.js file in the flexpath-syntax-variables-data-types-exercises folder. Inside of this file we have provided exercises for you to complete, written in code comments. For each exercise, please code ONLY in the space between the comments // CODE IN THE OPEN LINES BELOW and // CODE IN THE OPEN LINES ABOVE
4. To run your code for different exercises, you will update the exercise mentioned on line 20 of the file.
5. After changing that line, make sure to SAVE the file before running it.
6. To run your code in exercises.js, you will update line 20 to run the exercise code you want to run and save the file. THEN, open a Terminal window in VS Code by going to your toolbar at the top of the page and selecting "Terminal" -> "New Terminal"
7. Inside of this terminal, check that you have Node.js installed by running the command node -v. If your computer doesn't recognize that keyword, please go back and ensure you installed Node.js correctly.
8. To run exercises.js you will then use the command node exercises.js in the terminal to run the file.

We have included a screen recording showing this process in the file run-exercise-recording.mp4 in this repo.

VIDEO DISCLAIMER - You will need to clone the repo to your local device before you can watch the .mp4 file since GitHub does not support watching it from here.

Exercise solutions are in the /solution folder

 

Summary of JavaScript Concepts Covered in These Exercises

1. JavaScript Syntax:

   • Rules for writing valid JavaScript code.
   • Use of semicolons and how automatic semicolon insertion works.

2. Variables and Keywords:

   • Declaring variables using let, const, and var.
   • Best practices for naming variables, including camel case.

3. Data Types:

   • Primitive types: Boolean, Number, String, BigInt, Symbol, Null, and Undefined.
   • Objects and how they differ from primitive types.
   • Dynamic typing in JavaScript.

4. Operators:

   • Arithmetic operators, assignment operators, and the typeof operator.

5. Comments:

   • Using single-line and multi-line comments.
   • The role of comments in code readability and documentation.

6. Memory Management:

   • Concepts of stack and heap.
   • Garbage collection and automatic memory management.

7. Strings:

   • String creation and manipulation.
   • Template literals and string methods like toUpperCase, indexOf, and includes.

8. Boolean Values:

   • Using true and false and the ! (not) operator.
   • Understanding truthy and falsy values.

9. Numbers and BigInt:

   • Number representation, precision limits, and e-notation.
   • Using BigInt for large integers.

10. Null and Undefined:

    • Differences between null and undefined.
    • Using typeof to check variable types.

11. Objects:

    • Creating objects using object literals and constructors.
    • Accessing, modifying, and deleting object properties.
    • Passing objects by reference vs. passing primitives by value.

12. Date Object:

    • Creating and manipulating dates.
    • Methods for accessing parts of a date, such as getFullYear, getMonth, getDate, etc.
    • Understanding how JavaScript stores dates as milliseconds since the epoch.