CodeRoll | Frontend

console.log(+true)
console.log(!"John")

const shape = {
  radius: 10,
  diameter() {
    return this.radius * 2
  },
  perimeter: () => 2 * Math.PI * this.radius
}

console.log(shape.diameter())
console.log(shape.perimeter())

for (var i = 0; i < 3; i++) {
  setTimeout(() => console.log(i), 1)
}

for (let i = 0; i < 3; i++) {
  setTimeout(() => console.log(i), 1)
}

function sayHi() {
  console.log(name)
  console.log(age)
  var name = "John"
  let age = 30
}

sayHi()

let randomValue = { name: "Lydia" }
randomValue = 23

if (!typeof randomValue === "string") {
  console.log("It's not a string!")
} else {
  console.log("Yay it's a string!")
}