Stage 9 Level 5

var score = promptNum("What was your quiz score (0-100)?");
if (score >= 90) {
  console.log("Your quiz grade is an A");
} else if ((score >= 80)) {
  console.log("Your quiz grade is a B");
} else if ((score >= 70)) {
  console.log("Your quiz grade is a C");
} else if ((score >= 60)) {
  console.log("Your quiz grade is a D");
} else {
  console.log("Your quiz grade is an F");
}