如何给整个数组赋值0

I have an array. int[] array = new int[10];. I want to assign '0' to whole array without using loop means that 0 is to be stored in all of the indexes. How would i do it.

我有一个数组。数组=新的int[10];我想要在不使用循环的情况下将“0”分配给整个数组，这意味着0将被存储在所有的索引中。我该怎么做。

2 个解决方案

#1

After creation all items of array will have default values, which is 0 for int. So, you don't need to do anything here.

创建之后，数组的所有项都将具有默认值，即int为0，所以这里不需要做任何操作。

From Arrays (C# Programming Guide):

来自数组(c#编程指南):

The default values of numeric array elements are set to zero, and reference elements are set to null.

数值数组元素的默认值设置为0，引用元素设置为null。

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Also from C# Specification 12.2 Array creation

同样来自c#规范12.2数组创建

Elements of arrays created by array-creation-expressions are always initialized to their default value.

由array-creationexpression创建的数组元素总是被初始化为默认值。

5.2 Default values

5.2默认值

For a variable of a value-type, the default value is the same as the value computed by the value-type's default constructor

对于值类型的变量，默认值与值类型的默认构造函数计算的值相同

4.1.2 Default constructors

4.1.2默认构造函数

For sbyte, byte, short, ushort, int, uint, long, and ulong, the default value is 0.

对于sbyte, byte, short, ushort, int, uint, long, ulong，默认值为0。

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but after assigning other values i want all the indexes to be 0 again so then how would i do it?

但是在分配其他值之后，我希望所有的索引都是0，那么我怎么做呢?

UPDATE: You can use Array.Clear:

更新:你可以使用array。

Sets a range of elements in the Array to zero, to false, or to null, depending on the element type.

根据元素类型，将数组中的元素设置为0、false或null。

In your case:

在你的例子:

Array.Clear(array, 0, array.Length);

Consider also to use List<int> instead of array - it allows to add/remove items dynamically.

还可以考虑使用List 而不是数组，它允许动态地添加/删除项目。

#2

You don't need to do anything at all.

你不需要做任何事情。

Since int is a value type, all elements are initilialized to 0 as a default.

由于int是一种值类型，所以所有元素都被初始化为0作为默认值。

From Arrays (C# Programming Guide)

来自数组(c#编程指南)

The default values of numeric array elements are set to zero, and reference elements are set to null.

数值数组元素的默认值设置为0，引用元素设置为null。

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ok if i want it to be assigned to 3 then how would i do it?

如果我想把它赋值为3那么我该怎么做呢?

You can use for loop to assign them like;

可以使用for循环将它们赋值为;

int[] array = new int[10];
for(int i = 0; i < array.Length; i++)
    array[i] = 3;

If you want to give back their default values (which is 0 in this case), you can create a new array or you can use Array.Clear method like;

如果您想返回它们的默认值(在本例中为0)，您可以创建一个新的数组或使用数组。明确的方法;

Array.Clear(array, 0, array.Length);

If you really don't want to use any loop, you might need to use List<int> instead an array. It has more functionality and it creates a clean list (without any default value).

如果您真的不想使用任何循环，您可能需要使用List 而不是数组。它有更多的功能，并且创建了一个干净的列表(没有任何默认值)。