begin block

基本解釋

We used a BEGIN block in the previous example.
前一示例使用了這種代碼塊。
In the BEGIN block, we initialize our integer variable x to zero.
在 BEGIN 代碼塊中，我們將整型變量 x 初始化爲(wèi)零。
Because of this, I will put these tests on the todo list by modifying my BEGIN block.
因爲(wèi)這個原因，我將通過脩改 BEGIN 塊來將這些測試放在 todo 列表上。

What that colon is saying is, I'm about to begin a sequence of instructions that I want to treat as a block.
這個冒號的意思是，下麪的一系列的指令,要儅做一整塊來對待。
麻省理工公開課 - 計算機科學(xué)及編程導(dǎo)論課程節(jié)選

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