js function to calculate golf scores

Test Results buttons

These buttons are for manually testing the function.

Code

function golf_score(par, strokes) {
  var score_names = ['a Hole-in-one!', 'an Eagle (2 Under Par)', 'a Birdie', 'on Par', 'a Bogey', 'a Double Bogey', '.. Go Home!'];
  if(strokes == 1) { // this is always a hole in 1
    return score_names[0]; // hole in one
  }
  if(strokes === par) {
    return score_names[3]; // on par
  }
  if(strokes <= par - 2) {
    return score_names[1]; // eagle
  }
  if(strokes == par - 1) {
    return score_names[2]; // birdie
  }
  if(strokes >= par + 3) {
    return score_names[6]; // go home
  }
  if(strokes >= par + 2) {
    return score_names[5]; // double bogie
  }
  if(strokes >= par + 1) {
    return score_names[4]; // bogie
  }
}
function calc_result(ParNum, StrokesNum) {
  if(typeof ParNum === 'undefined') {
    ParNum = document.getElementById('ParNum').value;
  }
  if(typeof StrokesNum === 'undefined') {
    StrokesNum = document.getElementById('StrokesNum').value;
  }
  score_name = golf_score(ParNum, StrokesNum);
  document.getElementById('score_results').innerHTML = 'Par ' + ParNum + ' with ' + StrokesNum + ' Stroke(s) is ' + score_name;
}
console.log(golf_score(par = 3, strokes = 1));