JavaScript

Logical Operations

console.log("Hello Sam Smith" ?? "Hello Guest");

console.log(null ?? "Hello Guest");

console.log(undefined ?? "Hello Guest");

console.log(0 ?? 234);

console.log(false ?? true);

console.log(undefined ?? null);

console.log(null ?? null);

const user1 = {
  name: "Sam Smith",
  age: 32,
  role: "Admin",
};
console.log(`${user1.name} is a ${user1.role} user.`);

const user2 = {
  name: "Oliver Smith",
  age: 32,
};
console.log(`${user2.name} is a ${user2.role} user.`);

const defaultRole = "Standard";

const user1 = {
  name: "Sam Smith",
  age: 32,
  role: "Admin",
};
console.log(`${user1.name} is a ${user1.role ?? defaultRole} user.`);

const user2 = {
  name: "Oliver Smith",
  age: 32,
};
console.log(`${user2.name} is a ${user2.role ?? defaultRole} user.`);