An identifier may be defined once in a scope, but can be redefined in nested scopes. The following example will explain some of these points.

一个标识可以在一个作用域中定义一次，但可以在嵌套作用域中重新定义。

youdao

An identifier may be defined once in a scope, but can be redefined in nested scopes. The following example will explain some of these points.

一个标识可以在一个作用域中定义一次，但可以在嵌套作用域中重新定义。

youdao