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如何从生成随机数的数组中确定最高数和最低数;JavaScript_Javascript_Html_Arrays_Loops_Random - Fatal编程技术网

如何从生成随机数的数组中确定最高数和最低数;JavaScript

如何从生成随机数的数组中确定最高数和最低数;JavaScript,javascript,html,arrays,loops,random,Javascript,Html,Arrays,Loops,Random,Javascript: var arrayLength = prompt("Enter how many elements you want?"); if(isNaN(arrayLength) || arrayLength < 1){ arrayLength = 50; } var array = []; var list =

Javascript:

    var arrayLength = prompt("Enter how many elements you want?");

                if(isNaN(arrayLength) || arrayLength < 1){
                    arrayLength = 50;
                }

            var array = [];
            var list = "<ul>";

            var totalSum = 0;
            var totalOddSum = 0;
            var totalEvenSum = 0;
            var lowestNum = 0;
            var highestNum = 0;

            for(i = 1; i <= arrayLength; i++){

                array[i] = parseInt(Math.random() * 15);
                list += "<li>" + array[i] + "</li>";

                totalSum += array[i];

                if(array[i] % 2 == 0){
                    totalEvenSum += array[i];
                }
                    else{
                        totalOddSum += array[i];
                    }
            }

            list += "</ul>";

            document.getElementById("div1").innerHTML += list;

            document.getElementById("div2").innerHTML += "Total Sum: " + totalSum + "<br>";
            document.getElementById("div2").innerHTML += "Total Even Sum: " + totalEvenSum + "<br>";
            document.getElementById("div2").innerHTML += "Total Odd Sum: " + totalOddSum + "<br>";
            document.getElementById("div2").innerHTML += "Lowest Number: " + lowestNum + "<br>";
            document.getElementById("div2").innerHTML += "Highest Number: " + highestNum + "<br>";
HTML:

<div id="div1">
        </div>

<div id="div2">
</div>
正如标题所说,我希望能够找到数组生成的最低和最高数字。为了找到Math.random生成的最高和最低数字,我需要在循环中实现什么


谢谢大家。

首先,最小值和最大值的初始值是错误的:

var lowestNum = 0;
var highestNum = 0;
最小值应初始化为+Inf,最大值应初始化为-Inf

var lowestNum = Infinity, highestNum = -Infinity;
然后,添加一个简单的条件来更新迄今为止找到的最低和最高值

在循环结束时,变量将表示整个数组中的最低值和最高值。

您可以使用Math.max和Math.min查找数组中的最高值或最低值:

var highest = Math.max.apply(Math, array);

var lowest = Math.min.apply(Math, array);
没有必要自己做循环。这是因为Math.max和Math.min将接受任意数量的参数并对所有参数进行操作,因此如果使用.apply将数组作为一系列参数传递,它将在一次函数调用中计算整个数组

var highest = Math.max.apply(Math, array);

var lowest = Math.min.apply(Math, array);