<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
</head>
<body>
<script>
let kr = parseInt(prompt("국어 점수를 입력하세요"))
let en = parseInt(prompt("영어 점수를 입력하세요"))
let math = parseInt(prompt("수학 점수를 입력하세요"))
let avg = (kr + en + math) / 3
if (avg >= 95) {
grade = "A+"
} else if (avg >= 90) {
grade = "A"
} else if (avg >= 85) {
grade = "B+"
} else if (avg >= 80) {
grade = "B"
} else {
grade = "F"
}
console.log(`당신의 평균은 ${avg.toFixed(2)} 이고 ${grade}학점입니다.`)
</script>
</body>
</html>