Վեբ տեխնոլոգիաների խնդիրներ

let num1 = +prompt("Input a number 1");
let num2 = +prompt("Input a number 2");
console.log(num1, num2);
console.log(num1 + num2);
console.log(num1 - num2);
console.log(num1 * num2);
console.log(num1 / num2);

// Console:
// 8 2
// 10 6 16 4

let four = 1234;
let a = (four - (four % 1000))/1000;
let b = ((four % 1000) - (four % 100))/100;
let c = ((four % 100) - (four % 10))/10;
let d = four % 10;
console.log(a * b * c * d);

// Console:
// 24

let er = 123;
let har = (er - (er % 100))/100;
let tas = ((er % 100) - (er % 10))/10;
let mi = (er % 10)
let er2 = har * 100 + mi * 10 + tas
console.log(er2);

// Console:
// 132

function parz(num) {
  for (let i = Math.floor(num/2); i > 1; i--) {
    if (num % i == 0) {
      return false;
    }
  }
  return true;
}
let arr = [];
let j = 2;
while (true) {
  if (parz(j)) {
    arr.push(j);
    if (arr.length == 100) {
      break;
    }
  }
  j++;
}
console.log(arr);

// Console:
// [2,3,5,7,11,13,17,19,23,29,31,37,41,43,47,53,59,61,67,71,73,79,83,89,97,101,103,107,109,113,127,131,137,139,149,151,157,163,167,173,179,181,191,193,197,199,211,223,227,229,233,239,241,251,257,263,269,271,277,281,283,293,307,311,313,317,331,337,347,349,353,359,367,373,379,383,389,397,401,409,419,421,431,433,439,443,449,457,461,463,467,479,487,491,499,503,509,521,523,541]

let num = 8
for (let j = 1; j < num; j++) {
  let arr = [];
  for (let i = j + 1; i <= num; i++) {
    arr.push(i);
  }
  console.log(arr);
}

// Console:
// [2,3,4,5,6,7,8]
// [3,4,5,6,7,8]
// [4,5,6,7,8]
// [5,6,7,8]
// [6,7,8]
// [7,8]
// [8]

let arr = [];
for (let l = 0; l < 10; l++) {
  arr.push(+prompt("Input a number " + l));
}
for (let i = 0; i < arr.length; i++) {
  for (let j = i + 1; j < arr.length; j++) {
    if (arr[i] < arr[j]) {
      let t = arr[i];
      arr[i] = arr[j];
      arr[j] = t;
    }
  }
}
console.log(arr);