6.4 Conditional Loop

What does repeat until mean in Scratch?
在 Scratch 中，“重复直到”（repeat until）是什么意思？

• It executes the code indefinitely without checking any conditions.

  
  它会无限期地执行代码，而不检查任何条件。

• The 'repeat until' block runs only once regardless of conditions.

  
  无论条件如何，“重复直到”积木都只运行一次。

• The 'repeat until' block in Scratch means to keep executing the enclosed code until a specified condition becomes true.

  
  Scratch 中的“重复直到”积木表示持续执行其中包含的代码，直到满足指定条件为止。

• The block stops executing immediately when the program starts.
  
  程序启动时，该代码块立即停止执行。

Complete the block: repeat until This will repeat until the​ (a)   more than 10.

完成该代码块：重复执行，直到 _ 超过 10 分。

• score
• scoreboard
• Lives
• timer

repeat until will always run forever, even when the condition is true.
“Repeat until” 循环总是会无限运行，即使条件为真。

• True

• False

Pick the correct code order:
选择正确的代码顺序：

• 
• 
• 

You set: repeat until <(score) = 5>.
But your code never adds to the score.
What happens?

您设置：重复直到 <(score) = 5>。 但你的代码永远不会增加分数。 会发生什么？

• Game will still end after a while
  游戏最终还是会结束。

• Game ends immediately
  游戏立即结束

• Game will run forever
  游戏将无限期运行

Which is the best use for repeat until?
“Repeat until”的最佳用途是什么？

• Keep moving sprite 10 times
  让角色持续移动 10 次

• Keep playing music
  继续播放音乐

• Keep dropping apples until score reaches 10
  不断掉落苹果，直到分数达到 10

Which of the following best describes the repeat until block?
下列哪项最能描述 “repeat until” 积木？

• It runs the code inside forever
  它会无限期地运行其中的代码

• It repeats the code a fixed number of times
  它将代码重复执行固定的次数

• It runs the code until a condition becomes true
  它会一直运行代码，直到某个条件变为正确

• It runs only once
  它只运行一次

What is the difference between repeat until and forever?
“Repeat until” 和 “forever” 之间有什么区别？

• repeat until stops when a condition is met, forever never stops
  
  repeat until 在满足条件时停止，而 forever 则永不停止。

• forever is faster
  Forever 比较快

• repeat until is only used with timers
  repeat until 仅用于计时器。

• They are the same
  它们是一样的。

Repeat Until 积木会持续运行代码，直到_成立。
The repeat until block will keep running the code until the ​ (a)   is true.

• condition
• loop
• variable
• counter

Organize these options into the right categories
将这些选项归入正确的类别。

Groups:

(a) Forever

,

(b) Repeat Until

• Stops when condition is true

• 
• Runs endlessly

•