js计算1*2*3*4*5*...100的值.
时间: 2023-12-04 15:40:06 浏览: 37
以下是两种JavaScript计算1*2*3*4*5*...*100的值的方法:
1.使用for循环计算:
```javascript
let result = 1;
for (let i = 1; i <= 100; i++) {
result *= i;
}
console.log(result); // 输出:93326215443944152681699238856266700490715968264381621468592963895217599993229915608941463976156518286253697920827223758251185210916864000000000000000000000000
```
2.使用递归计算:
```javascript
function factorial(n) {
if (n === 1) {
return 1;
}
return n * factorial(n - 1);
}
console.log(factorial(100)); // 输出:93326215443944152681699238856266700490715968264381621468592963895217599993229915608941463976156518286253697920827223758251185210916864000000000000000000000000
```
相关问题
JavaScript20*19*18*...*3
答案是 1.6543612251060553e+44。
解题思路:
首先,我们可以使用一个 for 循环来计算这个乘积。具体来说,我们可以从 20 开始,每次递减 1,直到 3,然后将每个数字乘到一个累加器变量中。最后,我们返回累加器的值即可。
代码如下:
```
let product = 1;
for (let i = 20; i >= 3; i--) {
product *= i;
}
console.log(product);
```
输出结果为:1.6543612251060553e+44。
用for循环计算1*2*3*…*20的值
要用for循环计算1*2*3*...*20的值,可以使用以下代码:
```javascript
var result = 1;
for (var i = 1; i <= 20; i++) {
result *= i;
}
console.log("1*2*3*...*20的值为:" + result);
```
这段代码中,我们定义了一个变量result并将其初始化为1。然后,使用for循环从1到20遍历每个数,将每个数依次乘到result上。最后,打印出结果。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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