Full Stack Web Developer

Until now, you have worked with variables that store a single value at a time: a number, a text string, or a boolean. But real programs often need to handle many values at once. Imagine you want to store the names of thirty students, the prices of on...

Documentation and comments are two closely related practices that make your code understandable, maintainable, and reusable by yourself and by others. After learning to write loops, conditions, and functions, you now need to learn how to explain what...

THEORETICAL RECAP A factorial of a non-negative integer n (written n!) is the product of all positive integers from 1 up to n, with the special rule that 0! equals 1. In programming, the factorial is the classic example used to compare two approaches...

In the previous chapters, you learned to create functions and procedures to organize your code into reusable blocks. Now we go deeper into two fundamental concepts that determine how functions communicate with the rest of the program: the passage of ...

THEORETICAL RECAP A function is a reusable block of code that takes zero or more inputs (called parameters or arguments), performs a task, and often returns a result. The mental model to keep in mind is that of a machine: you feed it raw material (th...

Until now, you have written instructions in a single continuous block: conditions, loops, calculations, all following one another from top to bottom. This works for small exercises, but as soon as a program grows, this approach becomes unmanageable. ...

THEORETICAL RECAP A loop repeats a block of instructions until a condition is met. You have already worked with 'while' loops (repeat as long as a condition is true) and 'for' loops (repeat a known number of times, with a counter). The mental model t...

Nested loops are one of the most powerful tools in programming, but also one of the most dangerous in terms of performance. A nested loop is simply a loop placed inside another loop. You already know how to write a single loop (the 'while' and 'for' ...

THEORETICAL RECAP A factorial of a non-negative integer N, written N!, is the product of all positive integers from 1 up to N. For example, 5! = 5 × 4 × 3 × 2 × 1 = 120. By convention, 0! = 1. This is a perfect problem for the 'for' loop, because you...

Loops let you repeat instructions. But repetition alone is not enough: what matters is what you do during each repetition. Over time, programmers noticed that the same structures come back again and again. These are called loop patterns. Learning the...

THEORETICAL RECAP A 'while' loop repeats a block of instructions as long as a condition remains true. Its structure is simple: you define a starting point (an initialization), a condition that is tested before each iteration, and an update inside the...

In programming, one of the most powerful ideas is the ability to repeat instructions automatically. So far, you have learned how to store data in variables, run instructions in sequence, and make decisions using conditions with IF, AND, OR. Loops add...

THEORETICAL RECAP A program is a sequence of instructions executed in order. To build useful logic, you combine three foundations you have already studied: variables (containers that store data such as numbers, strings or booleans), conditions (IF / ...

Until now, you have learned to write a single condition inside an IF test, using comparison operators such as greater than, less than, or equal to. But in real programs, a single condition is often not enough. You frequently need to check several thi...

THEORETICAL RECAP A conditional structure lets a program make decisions. The core mental model is simple: 'IF a condition is true, THEN execute this block; OTHERWISE execute another block.' A condition is a boolean expression that evaluates to either...

Comparison operators and boolean values are at the heart of every decision your programs will ever make. In the previous chapters, you learned how to store data in variables, perform calculations, and write your first simple conditional test with the...

THEORETICAL RECAP A conditional test (the IF statement) allows a program to make decisions. Instead of executing instructions in a strict linear order, the program evaluates a condition — a boolean expression that is either TRUE or FALSE — and only r...

Until now, the programs you have written run in a straight line: each instruction executes one after the other, always in the same order. This is called a sequence. But a real program needs to make decisions. It must be able to react differently depe...

## Project Overview This mini-project is a skills validation checkpoint designed to consolidate everything you have learned so far in the 'Algorithmics and programming logic' chapter. Building directly on your work with variables, data types, constan...

THEORETICAL RECAP Before diving into this workshop, let's consolidate what you have learned so far. A variable is a named storage location in memory that holds a value which can change during program execution. A constant, by contrast, holds a fixed ...

**Theoretical Recap** A variable is a named memory slot used to store a value that can change during program execution. It has three key attributes: a name (identifier), a type (integer, real, string, boolean), and a value. When you perform calculati...

In the previous activities, you learned how to declare and assign variables, work with common data types, and write basic arithmetic expressions. You now have a solid foundation for understanding how data is stored and manipulated in an algorithm. In...

Every piece of information that a program manipulates must have a type. A data type tells the computer what kind of value is being stored and what operations can be performed on it. Without this concept, a program would not know whether the value 42 ...

**Theoretical Recap** A variable is a named container that holds a value at a given moment in a program's execution. You have already practiced declaring and assigning variables, as well as performing basic arithmetic expressions. Now, a classic and ...

THEORETICAL RECAP A variable is a named container that stores a value in memory during the execution of a program. Think of it as a labeled box: you give it a name, you put something inside, and you can open it, read its content, or replace it at any...