let name = "Петр";

if (true) {
  let name = "Василий";

  console.log(name); // "Василий"
}

console.log(name); // "Петр"

const name = "Петр";

name = "Василий"; // Ошибка

let str = `обратные кавычки`;

console.log(`это
  многострочная
  строка`);

let name = "Петр";

console.log(`Привет, ${name}!`);

let a = 2;
let b = 3;

console.log(`${a} + ${b} = ${a + b}`); // 2 + 3 =5

let inc = x => x + 1;

console.log(inc(1)); // 2

let group = {
  title: "Наш курс",
  students: ["Вася", "Петя", "Даша"],

  showList: function() {
    var self = this;

    self.students.forEach(function(student) {
        console.log(self.title + ": " + student);
    });
  }
}

group.showList();

...
  showList: function() {
    this.students.forEach(
      (student) => console.log(`${this.title}: ${student}`)
    )
  }
...

let name = "Петр";
let age = 18;

let person = { name, age };

let prop = "name";

let person = { [prop]: "Петр" };

let name = "Петр";

let person = {
  name,
  sayHi() {
    return this.name;
  }
};

let browsers = [ "Chrome", "Firefox", "IE", "Safari" ];

for(let bro of browsers) {
  if(bro == "IE")
    break;
  console.log(bro);
}

for(let char of "Привет") {
  console.log(char);
}