难以将一组数字放入函数中。

I'm getting a better understanding of functions, arrays and for loops. I'm looking to create a function which takes in an array of numbers and returns the total of all the items in the array added together. I figured out how to total an array.

我对函数、数组和循环有了更好的理解。我希望创建一个函数，它接收数组中的数字，并返回数组中所有项的总和。我算出了一个数组的总数。

var myArray = [1, 2, 3, 4, 5];
var myTotal = 0;

for (i = 0; i < myArray.length; i++) {
     myTotal += myArray[i];
}
                                   
console.log (myTotal);

I know how to create/call a function, however when I attempt to add the two concepts together it never works. Are you able to place an array into the parameters of a function?

我知道如何创建/调用一个函数，但是当我尝试将两个概念加在一起时，它就不起作用了。您是否能够将数组放入函数的参数中?

More or less I want to create a code concept which takes on an array of numbers into a function which totals the array. Any help would be greatly appreciated and thanks for taking the time to read my long winded question.

我或多或少地想要创建一个代码概念，它将一个数字数组转换为一个函数，该函数包含数组。任何帮助都将非常感谢，感谢您花时间阅读我冗长的问题。

4 个解决方案

#1

The short answer is yes. Any value, including an array reference, can be passed into a function.

简而言之，答案是肯定的。任何值，包括数组引用，都可以传递到函数中。

Here's what's needed in your case:

以下是你的案例中需要的:

var myArray = [1, 2, 3, 4, 5];

function totalArray(arr) {
  var myTotal = 0;
  
  for (var i = 0; i < arr.length; i++) {
     myTotal += arr[i];
  }

  return myTotal;
}

document.getElementById("value").innerText = totalArray(myArray);

<div id="value"></div>

#2

var myArray = [1, 2, 3, 4, 5];

function totalArray(arr) {
    var myTotal = 0;
    arr.forEach(number){myTotal +=number};
return myTotal;
}

console.log(totalArray(myArray));

Instead of a for loop you can also use for Each as shown above.

您也可以使用上面所示的for循环来代替for循环。

//btw I guess the mistake was just expecting the code to run instead of telling it to run.

//顺便说一下，我想错误只是期望代码运行而不是告诉它运行。

Javascript has its problems put every functionality in a function then execute it, is the normal way of doing things. While the snipet might run here, some things are needed in actual code for it to run

Javascript有它的问题把每个功能都放在一个函数中然后执行它，这是正常的做法。虽然snipet可能在这里运行，但实际运行的代码中需要一些东西。

#3

You can do it:

你可以这么做:

var myArray = [1, 2, 3, 4, 5];

function sum(arr) {
  return arr.reduce(function(a,b){return a + b;});
}

console.log(sum(myArray));

#4

-1

See if this helps :
//function 
function getTotal(myArray){

var myTotal = 0;

for (i = 0; i < myArray.length; i++) {
     myTotal += myArray[i];
}

 return  myTotal;
}


//function call
var myArray = [1, 2, 3, 4, 5];

var total = getTotal(myArray);

console.log(total);

console.log(总);

#1