for (let i = 1; i <= n; i++) { result *= i; } return result; } 这段代码中,我们首先定义了名为factorialLoop的函数。函数内部通过初始化一个名为result的变量为1,然后通过一个for循环,将result依次与1到n之间的每个整数相乘。这样,当循环结束时,result中保存的就是n的阶乘结果。 三、递归与循环...
JavaScript for...in Loop JavaScript break Statement JavaScript continue StatementBefore we wrap up, let’s put your knowledge of JavaScript for loop to the test! Can you solve the following challenge? Challenge: Write a function to calculate the factorial of a number. The factorial of a non...
function factorial(num) { if (num === 0 || num === 1) { return 1; } else { var result = 1; for (var i = 2; i <= num; i++) { result *= i; } return result; } } var num = 13; var factorialNum = factorial(num); console.log("13的阶乘是:" + factorialNum); 如何...
例子:当使用非法参数调用函数时就抛出一个Error对象 function factorial(x) { if ( x<0 ) throw new Error("x不能是负数"); // 如果输入参数是非法的,则抛出一个异常 for (var f=1; x>1; f*=x, x--) /* empty */ ; return f; } 当抛出异常的时,JavaScript解释器会立即停止当前正在执行的逻辑...
For example, the factorial of 3 is 3 * 2 * 1 = 6. Return the factorial of the input number num. 1 2 3 function calculateFactorial(num) { } Check Code Video: JavaScript while Loop Previous Tutorial: JS for Loop Next Tutorial: JS break Share on: Did you find this article he...
function factorial(number) { if (number <=1) { return 1 } else { return number * factorial(number - 1); } } alert(factorial(5)); // will alert 120 像变量声明一样,函数声明被提升到其作用域的开始。事实上,它们在所有其他语句之前被解析和评估,这意味着它们将在其定义的范围内立即可用,甚至...
//an expensive calculation (factorial) let result = 1; for (let i = 1; i <= input; i++) { result *= i; } return result; } // Test the expensive calculation with caching console.log(expensiveCalculation(5)); // Output: 120 (5 factorial) ...
log(factorial(3)); // 6 当将函数作为参数传递给另一个函数时,函数表达式很方便。下面的例子演示了一个叫 map 的函数,该函数接收函数作为第一个参数,接收数组作为第二个参数: jsCopy to Clipboard function map(f, a) { const result = new Array(a.length); for (let i = 0; i < a.length; ...
function factorial(x) { // 如果输入参数是非法的,则抛出一个异常 if (x < 0) throw new Error("x不能是负数"); // 否则,计算出一个值,并正常地返回它 for(var f = 1; x > 1; f *= x, x--) /* empty */ ; return f; }
function factorial2(n) { // Another version using a different loop let i, product = 1; // Start with 1 for(i=2; i <= n; i++) // Automatically increment i from 2 up to n product *= i; // Do this each time. {} not needed for 1-line loops ...