如何找到偶数？

Question

I am trying to find even numbers from 0 to 100 but it is not working.我试图找到从 0 到 100 的偶数，但它不起作用。 even it not showing any error.即使它没有显示任何错误。 can anyone help me to figure out?谁能帮我弄清楚？

<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>Document</title>
</head>

<body>

    <script>        
var x = 1;
        while (x <= 100) {
            if (x % 2 == 0) {
                console.log(x);
            } else {
                break;
            }
            x++;
        }
    </script>
</body>

</html>

Answer 1

 for(let x =0; x<=100; x+=2){ console.log(x); }

I wouldn't check for even numbers.我不会检查偶数。 It's easier to just start by 0 and add 2 each iteration.从 0 开始并在每次迭代中添加 2 会更容易。

Answer 2

function printEven() {
   for (let i = 1; i < 100; i++) {
      if(i % 2 === 0) {
        console.log(i);
      }
   }
}

Answer 3

<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>Document</title>
</head>

<body>

    <script>
    var x = 1;
        while (x <= 100) {
            if (x % 2 == 0) {
                console.log(x);
            } else {
                break;
            }
            x++;
        }
    </script>
</body>

</html>

It stops after the firs round, because "if (x % 2 == 0)" does not match and else is a "break"它在第一轮后停止，因为“if (x % 2 == 0)”不匹配，否则是“break”

Answer 4

It breaks out of your while loop like ivar said它打破了你的 while 循环，就像 ivar 说的那样

    while (x <= 100) {
        if (x % 2 == 0) {
            console.log(x);
        }
        x++;
    }

Answer 5

Here as a one liner:这里作为一个班轮：

 Array(50).fill().map((_, i) => i*2+2).forEach((v) => console.log(v)) // Alternatives console.log( Array(50).fill().map((_, i) => i*2+2) ) console.log( [...Array(50).keys()].map(i => i*2+2) ) console.log( [...Array(50)].map((_, i) => i*2+2) ) console.log( Array.from(Array(50), (_, i) => i*2+2) )

jk jk

如何找到偶数？

问题描述

5 个解决方案

解决方案1
1 2021-02-19 11:47:48

解决方案2
0 2021-02-19 11:42:26

解决方案3
0 2021-02-19 11:45:13

解决方案4
0 2021-02-19 11:47:01

解决方案5
0 2021-02-19 11:49:07

如何找到偶数？

问题描述

5 个解决方案

解决方案1 1 2021-02-19 11:47:48

解决方案2 0 2021-02-19 11:42:26

解决方案3 0 2021-02-19 11:45:13

解决方案4 0 2021-02-19 11:47:01

解决方案5 0 2021-02-19 11:49:07

解决方案1
1 2021-02-19 11:47:48

解决方案2
0 2021-02-19 11:42:26

解决方案3
0 2021-02-19 11:45:13

解决方案4
0 2021-02-19 11:47:01

解决方案5
0 2021-02-19 11:49:07