If you look at the Debug Messages pane, the answer is spelled out: The variable $multipler is undefined because it's a typo. It should be $multiplier.

如果看一下DebugMessages面板，答案就清楚了：变量 $multipler是未定义的，因为它是一个拼写错误，应该是 $multiplier。

youdao

If you look at the Debug Messages pane, the answer is spelled out: The variable $multipler is undefined because it's a typo. It should be $multiplier.

如果看一下DebugMessages面板，答案就清楚了：变量 $multipler是未定义的，因为它是一个拼写错误，应该是 $multiplier。

youdao