How to print the 2nd biggest number without using function and arrays

Question

let biggestNo;

for (let i = 1; i <= 10000; i++) {
  const a = prompt("enter a number");
  if (!a) {
    break;
  } else {
    biggestNo = Math.max(a);
  }
}
console.log(biggestNo);

How do I print 2nd biggest number using this approach without using functions and arrays

Answer 1

Here's a solution with time complexity of O(n):

const array = [31, 25, 43, 19, 8, 42];

let main = -Infinity, sub = -Infinity;

for (let num of array) {
  if(num > main) {
    sub = main;
    main = num;
  } else if(num > sub) {
    sub = num;
  }
}

console.log('biggest: ' + main);
console.log('second biggest: ' + sub);

---

Using user input:

let main = -Infinity, sub = -Infinity;

const total = 5;
for(let i = 1; i <= total; i++) {
  const num = +prompt(`Enter a number(${i} of ${total}):`)
  if(num > main) {
    sub = main;
    main = num;
  } else if(num > sub) {
    sub = num;
  }
}

console.log('biggest: ' + main);
console.log('second biggest: ' + sub);