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const sampleArr = [1, 9, 17, -3, 7, 89, 40, 100, 121, 8];
const maxValue = Math.max(...sampleArr);
const minValue = Math.min(...sampleArr);
console.log(maxValue); //121
console.log(minValue); //-3

raunaqsachdev

function addThreeNumbers(a, b, c) {
  return a + b + c;
}

let sampleArr = [1, 2, 3];
console.log(addThreeNumbers(...sampleArr)); //6 

raunaqsachdev

var sampleArr = [1, 2, 3, 4, 5];
var x = sampleArr[0],
    y = sampleArr[1];
var temp = [x, y];
y = temp[0];
x = temp[1];

var subArr;
x = sampleArr[0];
y = sampleArr[1];

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let sampleArr = [1, 2, 3, 4, 5];
let [x, y] = sampleArr; 
[y, x] = [x, y];
let subArr;
[x, y, ...subArr] = sampleArr;
console.log(subArr); //[3, 4, 5];