approach way to declare variables good vs bad in starwars universe

star vars declaration

//bad
function(){
  var force = 0; 

  for(var i=0; i<500; i++){
    //using the force
    force++;
  }

  var lightSaber = 0;
  var siths = 100;
  
  for(var siths=100; siths>0; siths--){
    lightSaber++;
  }

  var forceAndSaber = lightSaber.toString() + force.toString();
  
  console.log('if you use force with the saber its: ' + forceAndSaber);
  console.log('number of siths remain: ' + siths);
  
}

//good
function(){
  var force = 0;
  var lightSaber=0;
  var forceAndSaber = '';
  var siths;

  for(var i=0; i<500; i++){
    //using the force
    force++;
  }
  
  for(siths=100; siths>0; siths--){
    //using the lightsaber, while decreasing number of siths.
    lightSaber++;
  }

  forceAndSaber = lightSaber.toString() + force.toString();
  
  console.log('if you use force with the saber its: ' + forceAndSaber);
  console.log('number of siths remain: ' + siths);
  
}