What is the translation of " UNDEFINED " in English?

• undefined

Examples of using Undefined in Chinese and their translations into English

结果*-值undefined。
Result- the unscaled value.

Null和undefined是其中两个。
And Infinity are two of them.

Null不等同于undefined。
Zero is not the same as undefined.

技术上，它的值是undefined。
Technically it has the value of undefined.

Null不等同于undefined。
Null is not the same with Undefined.

Undefined：变量被声明后，但未被赋值.
Error: Variable used without being declared.

都会被定义为undefined。
Not defined are referred to as undefined.

Undefined和null有什么区别?
What is the difference between undefined and null?

它的值被设置为undefined(第三行)。
Its value is set to undefined.(line 3).

Value在这里可以访问，值为undefined.
Value exists here with a value of undefined.

在这种情况下，解释的值返回undefined。
In either case, the returned value is undefined.

这就是我们得到undefined而不是3的原因。
This is why we get two undefined values rather than three.

Value在这里可以访问到，值为undefined.
Value exists here with a value of undefined.

检测undefined的更加准确的方法是用typeof操作：.
The more precise way to check for undefined is to use typeof:.

这个变量声明后默认得到了Undefined值.
This variable is declared but has a value of undefined.

Undefined不应该被与其他值进行比较：.
The value undefined shouldn't be compared to other values:..

但是，提升后的变量将返回undefined值。
However, variables that are hoisted return a value of undefined.

请注意，所有声明的变量都被分配了默认值undefined。
Notice all the variable declarations were assigned a default value of undefined.

任何变量都可以通过设置值为undefined来清空。
Any variable can be emptied, by setting the value to undefined.

有两种特殊值，写入null和undefined，被用来表示不存在的值。
There are two special values, written null and undefined, that are used to denote the absence of a meaningful value.

任何变量均可通过设置值为undefined进行清空。
Any variable can be emptied, by setting the value to undefined.

最后，undefined是一个预定义的全局变量(不像null关键字)初始化为undefined值:.
Lastly, undefined is a predefined global variable(not a keyword like null) that is initialized to the undefined value:.

然而提升后的变量将返回undefined值。
However, variables that are hoisted will return a value of undefined.

有趣的是，在JavaScript中，null和undefined是并不同，这就是为什么我们看到的是两个不同的错误信息。
Interestingly, in JavaScript, null and undefined are not the same, which is why we see two different error messages.

组件的状态(例如this.state)开始于undefined。
A component's state(e.g. this. state) begins life as undefined.

如果delete操作成功，属性或者元素会变成undefined。
If the delete operator succeeds, it sets the property or element to undefined.

因此，调用theta将为局部作用域的变量e输出undefined，并为块级作用域的变量f抛出一个错误。
So calling theta will output undefined for the locally scoped variable e and throw an error for the block scoped variable f.

您只能为无类型变量赋予undefined这一值。
You can only assign a value of undefined to variables that are untyped.

Void运算符通常只用于获取undefined的原始值，一般使用void(0)（等同于void0）。
The void operator is often used merely to obtain the undefined primitive value, usually using"void(0)"(which is equivalent to"void 0").