46 lines
1.4 KiB
Markdown
46 lines
1.4 KiB
Markdown
|
---
|
|||
|
|
title: Comparison with the Equality Operator
|
|||
|
|
localeTitle: 与平等算子的比较
|
|||
|
|
---
|
|||
|
|
## 与等式运算符的比较
|
|||
|
|
|
|||
|
|
### 问题解释：
|
|||
|
|
|
|||
|
|
_将相等运算符添加到指示的行，以便当`val`等于12时，函数将返回“Equal”。_
|
|||
|
|
|
|||
|
|
#### 提示1
|
|||
|
|
|
|||
|
|
请记住， _相等性与赋值（ `=` ）不同，后者将运算符右侧的值赋给左侧的变量。_ [1](#cite1)
|
|||
|
|
|
|||
|
|
> _现在尝试解决问题_
|
|||
|
|
|
|||
|
|
## 扰流板警报！
|
|||
|
|
|
|||
|
|
**提前解决！**
|
|||
|
|
|
|||
|
|
## 基本代码解决方案
|
|||
|
|
|
|||
|
|
```javascript
|
|||
|
|
function testEqual(val) {
|
|||
|
|
if (val == 12) { // Change this line
|
|||
|
|
return "Equal";
|
|||
|
|
}
|
|||
|
|
return "Not equal";
|
|||
|
|
}
|
|||
|
|
// Change this value to test
|
|||
|
|
testEqual(10);
|
|||
|
|
```
|
|||
|
|
|
|||
|
|
· [在repl.it上运行代码](https://repl.it/@AdrianSkar/Basic-JS-Equality-operator)
|
|||
|
|
|
|||
|
|
### 代码说明
|
|||
|
|
|
|||
|
|
功能首先评估`if`条件`(val == 12)`的计算结果为`true` 。如果是，则返回大括号之间的语句（“Equal”）。如果没有，则返回它们之外的下一个`return`语句（“Not equal”）。
|
|||
|
|
|
|||
|
|
### 来源
|
|||
|
|
|
|||
|
|
1 。 [“基本JavaScript：与平等运算符的比较”，JCC _算法和数据结构认证的_ fCC课程](https://learn.freecodecamp.org/javascript-algorithms-and-data-structures/basic-javascript/comparison-with-the-equality-operator)
|
|||
|
|
|
|||
|
|
### 资源
|
|||
|
|
|
|||
|
|
* [“Equality operator” - _MDN JavaScript参考_](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Comparison_Operators#Equality_())
|