如何在循环时执行此操作

Question

var understand = true;    
while( ){
    console.log("I'm learning while loops!");    
    understand = false;
}

我应该在括号中添加什么来打印“我正在学习循环！”

Answer 1

在parens中添加understand会使其打印"I'm learning while loops!"然后停止（因为打印后understand设置为false）。

Answer 2

您需要在while循环中传递语句：

var understand = true;    
while( understand ){ //while understand == true
    console.log("I'm learning while loops!");    
    understand = false;
}

详细了解while here