// a
function a() {
   return alert('Привет');
}
a()

// cube
function cube() {
   return console.log(prompt('number') ** 3);
}
cube()

// avg2
function avg2() {
   let a = +prompt('num1')
   let b = +prompt('num2')
   return console.log((a + b) / 2);
}
avg2()
// avg2(5, 10)
// avg2(1, 2)

// sum3
function sum3(a, b, c) {
   a = a || 0;
   b = b || 0;
   c = c || 0;
   a = +prompt('num1')
   b = +prompt('num2')
   c = +prompt('num3')
   return console.log(a + b + c);
}
sum3()

// console.log(sum3(1, 2, 3))
// console.log(sum3(5, 10, 100500))
// console.log(sum3(5, 10))



// intRandom
// function intRandom(min, max) {
//    min = min || 0;
//    max = max || 0;
//    let result = Math.random() * (max - min) + min;
//    return Math.round(result)
// }
function intRandom() {
   let min = +prompt('min');
   let max = +prompt('max');
   if (max === undefined) {
      max = min
      min = 0
   }
   return console.log(Math.floor(Math.random() * (max - min + 1) + min))
}
intRandom()
// console.log(intRandom(2, 15))
// console.log(intRandom(-1, -1))
// console.log(intRandom(0, 1))
// console.log(intRandom(10))


// greetAll
function greetAll(...arguments) {
   alert(`Hello ${arguments}!`)
}
greetAll("Superman")
greetAll("Superman", "SpiderMan")
greetAll("Superman", "SpiderMan", "Captain Obvious")


// sum
function sum(...arguments) {
   let result = 0
   for (let arg of arguments) {
      result += arg
   }
   console.log(result)
}
sum(1)
sum(2)
sum(10, 20, 40, 100)



// Union
var sample = prompt("Введите название задания").toLowerCase()
switch (sample) {
   case "a": a()
      break;
   case "cube": cube()
      break;
   case "avg2": avg2()
      break;
   case "sum3": sum3()
      break;
   case "intrandom": intRandom()
      break;
   case "greetall": greetAll()
      break;
   case "sum": sum()
      break;
}


// Union declarative
var sample = {
   a() { a() },
   cube() { cube() },
   avg2() { avg2() },
   sum3() { sum3() },
   intrandom() { intRandom() },
   greetall() { greetAll("Superman", "SpiderMan", "Captain Obvious") },
   sum() { sum(10, 20, 40, 100) }

}
console.log(sample[prompt('enter')]())