Why does the code show prime and non-prime both answers?

June 8, 2022

I am getting if and else both results from my JS Code even after using flags and break. What seems to be the possible reason?

function myFunction(){
  let x = document.getElementById("int").value;
  const rootx = Math.sqrt(x);
  let textx = "";
  let isPrimeX = true;
  //checking the prime of x input
 for (let i = 2; i<=rootx; i++){
    if(x % i === 0 || x<=1 || x>2){
      textx += x + " is not a prime number"
      let isPrimeX = false;
      break;
    }
 }if(isPrimeX == true){
  textx += x + " is a Prime Number";
 }
 document.getElementById('demo').innerHTML = textx;
  }

enter image description here

>Solution :

you are redeclaring isPrimeX

just remove let like this

function myFunction(){
  let x = document.getElementById("int").value;
  const rootx = Math.sqrt(x);
  let textx = "";
  let isPrimeX = true;
  //checking the prime of x input
 for (let i = 2; i<=rootx; i++){
    if(x % i === 0 || x<=1 || x>2){
      textx += x + " is not a prime number"
      isPrimeX = false;
      break;
    }
 }if(isPrimeX == true){
  textx += x + " is a Prime Number";
 }
 document.getElementById('demo').innerHTML = textx;
  }