javascript - 打印从 a 到 b 的素数，a 到 b 是用户使用 javascript 输入的值

Question

我试过了，但只能得到 1 到 50 或 1 到 100 个素数。我应该如何正确找出质数。用户问了哪些？

    <h1>enter the no.</h1><input type="text" id="limit">
    <h1>enter the no.</h1><input type="text" id="limit2">
    <button onclick="fun()">Submit</button>
    <div id="result"></div>
<script type="text/javascript">
            function fun() {
                var i = limit;
                var j = limit2; 
                limit = document.getElementById('limit').value;
                limit2 = document.getElementById('limit2').value;
                for (i = limit; i <= limit2; i++) {
                    c = 0;

                    for (j = 1; j <= i; j++) {
                        if (i % j == 0) {
                            c++;
                        }
                    }

                    if (c == 2) {
                        document.getElementById("result").insertAdjacentHTML('beforeend', i + '<br>');
                    }
                }
            }
</script>

Answer 1

找出下面的更正

function fun() {
  /*var i = limit;*/
  /*var j = limit2;*/
  var limit = document.getElementById('limit').value;
  var limit2 = document.getElementById('limit2').value;
  var result = document.getElementById("result");
  result.innerHTML = "Result: ";
  for (var i = limit; i <= limit2; i++) {
    var prime = true;
    /* set j = 2 and NOT j = 1 */
    for (var j = 2; j < i; j++) {
      if (i % j == 0) {
        prime = false;
        break;
      }
    }

    if (prime) {
      result.insertAdjacentHTML('beforeend', i + ','); /* replaced <br/> with , to avoid page scroll */
    }
  }
}
fun(); /* test pupose only */

h1 {
  margin: 0px;
}

<h1>enter the no.</h1><input type="text" id="limit" value="12">
<h1>enter the no.</h1><input type="text" id="limit2" value="55">
<button onclick="fun()">Submit</button>
<div id="result">Result:</div>