Foundations

JavaScript · Beginner - the basics, step by step

• Variables (let, const) and primitive typesDiscover how to store information with let and const, and identify the basic value types in JavaScript.
• Operators and conditions (if/else, comparisons, ===)Learn how to calculate, compare values with === and make your program take decisions with if and else.
• Loops: for, while, for...ofRepeat instructions without repeating yourself thanks to for, while and for...of loops.
• Functions: declaration, parameters, returnCreate reusable blocks of code with function, pass them parameters and get their results back with return.
• Arrays and objects: creating, reading, modifyingStore several values in arrays, describe entities with objects, then learn how to read and modify them.