While it may not be as concise, it offers clarity in terms of what each part of the code is doing. function sumArray(arr) { let sum = 0; arr.forEach((number) => { sum += number; }); return sum; } const numbers = [1, 2, 3, 4, 5]; console.log(sumArray(numbers)); ...
第一种是使用Array构造函数。 varnames=newArray();varnames=Array();//可以省略new 操作符 。varnames=newArray(20);varnames=newArray("Merry","Jack","Lily"); 第二种是使用数组字面量表示法。项之间用逗号隔开。 varnames=["Mary","Rose"];varnames=[];//空数组varnumbers=[4,5,];//这样会创...
假设我们要计算一个数组中所有元素的总和。 constnumbers = [10,20,30,40,50];letsum =0; numbers.forEach(function(number) { sum += number; });console.log('Sum:', sum); javascript 的数组遍历实例 互动练习 1.请使用 for 循环遍历下面的数组,将每个元素打印出来: letarr = ['a','b','c']...
可以使用以下 JavaScript 代码实现：javascriptCopy code function sumOfEvenNumbers(array) { let sum ...
This example finds the sum of all numbers in an array: Example constnumbers = [45,4,9,16,25]; letsum = numbers.reduce(myFunction); functionmyFunction(total, value, index, array) { returntotal + value; } Try it Yourself »
numbers - Name of the array. [10, 30, 40, 60, 80] - Elements of the array. Examples of JavaScript Arrays Here are a few examples of JavaScript arrays: // empty array const emptyArray = []; // array of strings const dailyActivities = ["eat", "work", "sleep"]; // array with...
for(let x of array) { // Loop over array, assigning each element to x. sum += x; // Add the element value to the sum. } // This is the end of the loop. return sum; // Return the sum. } sum(primes) // => 28: sum of the first 5 primes 2+3+5+7+11 ...
javascript vuejs2 sum numbers 1个回答 1投票 而不是Number你可以使用parseInt,并使用replace与g修饰符来取代所有的发生: computed: { total: function(){ return parseInt(this.ValorImovelPatrimonio.replace(/\./g,'')) + parseInt(this.ValorAutosPatrimonio.replace(/\./g,'')) + parseInt(this.Valor...
total = total + array[count] } return total } 1. 2. 3. 4. 5. 6. 7. 使用reduce函数的方式: function sum(array){ return array.reduce((sum, number) => sum + number, 0) } 1. 2. 3. 这两个函数的工作方式完全相同(reduce函数只是一个内置的for循环),并且在给定相同数组的情况下将返回...
console.log( sum(0,1,1,2,3,5,8)); // 20 方法是在构造函数的原型上定义的,可以通过对象创建的构造器调用,如Array.prototype.forEach;Array表示构造器,调用类的实例作为上下文对象参考的,如下: 在foreach中numbers表示上下文对象: var numbers = [1,2,3]; // create an instance of Array ...