console.log(Number.MAX_VALUE)
console.log(Number.MIN_VALUE)
console.log(Number.NEGATIVE_INFINITY)
console.log(Number.POSITIVE_INFINITY)

var month = 0
if (month <= 0 || month > 12) {
  month = Number.NaN
  console.log(month)
} else {
  console.log("else")
}

function employee(id:number, name:string) {
  this.id = id
  this.name = name
}
var emp = new employee(123, "admin")
employee.prototype.email = "admin@runoob.com"

console.log(emp.id)
console.log(emp.name)
console.log(emp.email)