Affectation aprs addition (+=)

let a = 2;
let b = "hello";

console.log((a += 3)); // Addition
// Expected output: 5

console.log((b += " world")); // Concatenation
// Expected output: "hello world"

Oprateur: x += y;
Signification: x = x + y;

let toto = "toto";
let truc = 5;
let machin = true;

// nombre + nombre -> addition
truc += 2; // 7

// boolen + nombre -> addition
machin += 1; // 2

// boolen + boolen -> addition
machin += false; // 1

// nombre + chane de caractres -> concatnation
truc += "toto"; // "5toto"

// chane de caractres + boolen -> concatnation
toto += false; // "totofalse"

// chane de caractres + chane de caractres -> concatnation
toto += "truc"; // "tototruc"