webcontent/java2.html at main · KIMCHAEYI/webcontent · GitHub

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<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Java2</title>
    <style>
        body {
            background: rgb(69, 66, 90);
        }
        .but1 {
            width: 130px;
            height: 30px;
            border-radius: 20px;
            border-color: #786d84;
            font-size: 1.2em;
            display: block;
            margin: 5px auto;
            font-family: 나눔바른펜;
            color: white;
        }
    </style>
</head>
<body>
    <button class="but1" onclick="cal1()" style="background: #2f466e;">합계1 </button>
    <button class="but1" onclick="sosu()" style="background: #4a3e6c;">소수 판별</button>
    <button class="but1" onclick="divisor()" style="background: #694770;">약수 구하기</button>
    <button class="but1" onclick="holjjak()" style="background: #704761;">짝홀수 판별</button>
    <button class="but1" onclick="divisor()" style="background: #754352;">배수 판별</button>

    <script>
        function cal1() {
            var i, sum = 0;
            var a = parseInt(prompt("첫 번째 숫자를 입력"));
            var b = parseInt(prompt("마지막 숫자를 입력"));
            for(i=a; i<=b; i++) {
                sum = sum + i;
            }
            alert(sum);
        }

        function sosu() {
            var i;
            var num1 = prompt("소수 판별 숫자를 입력하세요.");
            for(i=2; i < num1; i++) {
                if(num1 % i == 0) {
                    alert("소수가 아닙니다.");
                    break;
                }
                else if(i == num1 - 1) {
                    alert("소수입니다.");
                }
            }
        }

        function divisor() {
            var i, s = "";
            var num1 = prompt("약수를 구할 숫자를 입력하세요");
            for(i=1; i < num1; i++) {
                if(num1 % i == 0) {
                    s = s + i + " ";
                }
            }
            alert(s);
        }

        function holjjak(num) {
            var answer = "";
            if(num % 2 == 0) { //짝수인 경우
                answer='Even';
            }
            else //홀수인 경우
                answer='Odd';
            return answer;
}
    </script>
</body>
</html>