4geeksacademy / javascript-beginner-exercises-tutorial

Learn to Code: Interactive and Auto-graded Tutorials In Javascript

JavaScript exercises tutorial at 4Geeks Academy

By @alesanchezr and other contributors at 4Geeks Academy

Estas instrucciones están disponibles en 🇪🇸 español 🇪🇸

Complete selection of auto-graded and interactive JavaScript exercises for anyone interested in learning JavaScript!

Before you start... some related tutorials:

1. JavaScript for Beginners ← 🔥 You are here
2. Looping with JavaScript
3. JavaScript Functions
4. Master JavaScript

We need you! These exercises are built and maintained in collaboration with contributors such as yourself. If you find any bugs or misspellings please contribute and/or report them.

One click installation (recommended):

You can open these exercises in just a few seconds by clicking: Open in Codespaces (recommended) or Open in Gitpod.

Once you have VSCode open the LearnPack exercises should start automatically. If exercises don't run automatically you can try typing on your terminal: $ learnpack start

Local Installation

Clone the repository in your local environment and follow the steps below:

1. Install LearnPack, the package manager for learning tutorials and the node compiler plugin for learnpack, make sure you also have node.js 14:

$ npm i learnpack -g
$ learnpack plugins:install learnpack-node

2. Start the tutorial/exercises by running the following command at the same level where your learn.json file is:

$ npm i [email protected] -g
$ learnpack start

Note: The exercises have automatic grading, but it's very rigid and strict, my recommendation is to not take the tests too serious and use them only as a suggestion, or you may get frustrated.

How are the exercises organized?

Each exercise is a small React application containing the following files:

1. app.js: represents the entry JavaScript file that will be executed by the computer.
2. README.md: contains exercise instructions.
3. test.js: contains the testing script for the exercise (you don't have to open this file).

Contributors

Thanks goes to these wonderful people (emoji key):

1. Alejandro Sanchez (alesanchezr), contribution: (coder) 💻 (idea) 🤔, (build-tests) ⚠️ , (pull-request-review) 👀 (build-tutorial) ✅ (documentation) 📖

2. Paolo (plucodev), contribution: (bug reports) 🐛, contribution: (coder), (translation) 🌎

3. Ricardo Rodriguez (RickRodriguez8080) contribution: (build-tutorial) ✅, (documentation) 📖

This project follows the all-contributors specification. Contributions of any kind are welcome!

This and many other exercises are built by students as part of the 4Geeks Academy Coding Bootcamp by Alejandro Sánchez and many other contributors. Find out more about our Full Stack Developer Course, and Data Science Bootcamp.

javascript-beginner-exercises-tutorial's Issues

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Exercise 14 test is looking for "Hello World"

The test is looking for Hello World in the console instead testing the switch statement.

Test of lesson 05 only passes if you input 40

It will only work if you input 40, but the number itself shouldn't matter, only the logic behind it.

Learnpack issue

When I am using learnpack during the JS exercises, when I try to test my code it says "internal error."

TEST BUTTON ON FIRST JAVASCRIPT EXERSISE

When I hit the test button an error message comes up and dosent not allow me to do so

error persistente

al llegar a un cierto punto del learn pack me da error y no me sigue cargando

Exercise 06 is impossible to accomplish without breaking the rules

The exercise has a line saying "Change the code below:", so it's impossible to change it without breaking the rules

Section 3 of the Javascript section

I am not able to check my work or move forward. Everytime I try to press the check mark, it says there is an error.

Exercise 15 is missing the test

The file test.js is empty.

The test button shows error

when I press test to see if it is correct it shows unexpected error

learnpack issue

Testing Bug in Exercise 20

There appears to be a bug in the tests for excercise 20. The potential solution (below) fails with :

     x (fail) 2. console.log() function should be called 10 times
     x (fail) 3. console.log() function should be called with a string

even though it does call console.log 10 times with a string (the generated colors):

//get random integer between (inclusive of) min and max
function getRandomInt(min, max) {
	min = Math.ceil(min);
	max = Math.floor(max+1);
	return Math.floor(Math.random() * (max - min) + min);
  }
  
function getColor(colorNumber=0)
{
	//make sure parameter is a number and not a string by converting the value to int:
	colorNumber = parseInt(colorNumber);
	switch(colorNumber){
		case 1: return "red"; 
				break;
		case 2: return "yellow"; 
				break;
		case 3: return "blue"; 
				break;
		case 4: return "green"; 
				break;
		default: return "black"; 
				 break;
	}
}

function getAllStudentColors(){
	
    for(let i=0; i<10; i++){
		let studentColor = getColor(getRandomInt(1,4));
		console.log(studentColor);

	}

}

//call the function below with the number of students in the class and print on the console
getAllStudentColors();