Advanced working with function: Function in if

还没有人认领这个 Issue。

**Function in if**

let phrase = "Hello";

if (true) {
let user = "John";

function sayHi() {
alert(`${phrase}, ${user}`);
}
}

sayHi();

**As mentioned, in the solution:**
The result is an error.
The function sayHi is declared inside the if, so it only lives inside it. There is no sayHi outside.

But, this is wrong.
once the function is called, it will give us "Hello John" and the explanation is quite simple.
There, won't be any error.

审查“Function in if”示例以及 issue 中引用的解决方案说明。在 JavaScript 运行时中验证所描述的行为，然后更新教程文本，使说明与观察到的结果一致，并明确函数的作用域。

由索引模型根据 Issue 内容生成。