Day9数组

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练习：求数组【2,6,1,7,4】里所有的和与数组的平均值

<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>数组求和及平均值</title>
</head>

<body>
  <script>
    let arr = [2, 6, 7, 1, 4]
    // 声明求和变量 sum
    let sum = 0
    // 遍历累加求和
    for (let i = 0; i <= 4; i++) {
      sum += arr[i]
    }
    console.log(`数组的和为${sum}`)

    // 求平均值
    console.log(`数组的平均值为${sum / arr.length}`);
  </script>
</body>

</html>

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求数组的最大值和最小值

<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>求数组的最大值与最小值</title>
</head>

<body>
  <script>
    let arr = [23, 42, 34, 56, 7, 5, 76, 32, 13]
    // 求数组的最大值与最小值
    let max = arr[0]
    let min = arr[0]
    for (let i = 1; i < arr.length; i++) {
      if (max < arr[i]) {
        max = arr[i]
      }
      if (min > arr[i]) {
        min = arr[i]
      }
    }
    document.write(`数组的最大值为${max}<br>`)
    document.write(`数组的最小值为${min}`)
  </script>
</body>

</html>

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posted @ 2026-01-07 21:05  冰涿  阅读(1)  评论(0)    收藏  举报