The password is entered through the text if the password is incorrect, then delete body and "the password is not correct" if correct, then "the password is correct"

let input = Number(prompt("Please enter the password"));

function ab(){
  if (input === 123) {
    document.body.innerHTML = "the password is correct";
  }
  else{
    document.body.innerHTML = "the password is not correct";
  }
}

ab();