Courses | Code Learning Hub

Full catalog

Browse the complete list. Hours are an estimate of focused study time; levels assume no prior experience at Beginner and some familiarity at Intermediate and Advanced.

Course	Language	Level	Hours
Python Basics	Python	Beginner	40
Python Data Science	Python	Intermediate	45
Web Development	JavaScript	Beginner	50
JavaScript Interactivity	JavaScript	Beginner	35
Frontend Projects	HTML/CSS	Beginner	25
Intro to Java	Java	Intermediate	45
Java Desktop Apps	Java	Advanced	40
C++ Fundamentals	C++	Intermediate	50
Algorithms and Data Structures	Multiple	Advanced	60
Databases with SQL	SQL	Intermediate	30
Git and Collaboration	Git	Beginner	15
Capstone Project Track	Multiple	Advanced	55

Prerequisites: Beginners should start with Python Basics or Web Development, which assume no prior coding experience. All other courses assume you can read and run simple programs in the listed language. Check each course page for the exact list of required skills.

Core patterns you will master

Every course builds on a few core ideas. Here is one essential pattern from four different languages, all of which you will use in your projects. Hit Run to see a snippet execute or to preview its output.

Total snippets you have run on this device: 0

Python: loops and lists

Lists store a sequence of values in order, and a for loop visits each one. This snippet builds a list of squares and prints each result. It is a pattern you will use constantly in data work and scripting. The Run button here shows the expected output; copy it and run it in a local Python install for the live result.

numbers = [1, 2, 3, 4] squares = [] for n in numbers: squares.append(n * n) print(squares)

JavaScript: functions and arrays

Functions wrap a block of logic so you can reuse it, and the map method transforms every item in an array. This snippet squares each number in the array and stores the results in a new array, leaving the original untouched. It runs live in your browser when you press Run.

const numbers = [1, 2, 3, 4]; function square(x) { return x * x; } const squares = numbers.map(square); console.log(squares);

Java: classes

In Java you organize code with classes, which bundle data and the methods that act on it. This snippet defines a simple Rectangle class with width and height fields and a method that computes and prints the area. Java needs a compiler, so the Run button shows the expected output instead of executing.

class Rectangle { double w, h; Rectangle(double w, double h) { this.w = w; this.h = h; } double area() { return (w * h); } void show() { System.out.println("Area: " + area()); } }

The class above stores two fields and computes area. A separate main method would create a Rectangle, call show(), and print the result. This object-oriented layout is the backbone of most Java programs.

C++: vectors and range loops

A vector is a resizable sequence, and the range loop visits each element in order. This snippet prints every value on its own line. C++ compiles to native code, so the Run button shows the expected output rather than executing in the browser.

#include <iostream> #include <vector> int main() { std::vector<int> v = {2, 4, 6}; for (int n : v) { std::cout << n << "\n"; } return 0; }