You can place a print statement within the loop to verify that data indeed exists at each element in the foreach loop.

可以在循环中放一个print语句，检验在foreach循环中每个元素中是否确实存在数据。

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The outer collect loop iterates over these reservation groups, and the inner collect loop iterates over the servers contained within each restrain group.

外部的collect循环遍历这些保留组，而内部的collect循环遍历每个限制组中的服务器。

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This example USES two for loops. The outer for loop takes care of each row in The Times table, and the nested for loop takes care of the columns within each row.

本例使用两个for循环，外面的for循环关注乘法表中的每一行，嵌套的for循环关注每行内的列。

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Some models are decomposed into multiple levels, such as a While loop within a local subprocess, within a While loop.

有些模型被分解为多个级别，例如While循环中的局部子流程中的While循环。

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The basic syntax of a for loop is shown in Listing 1, which also demonstrates how to use continue and break statements within a for loop.

清单1中显示了for循环的基本语法，还演示了如何在for循环中使用continue和break语句。

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To avoid infinite iterations of LOOP statements, new EXIT and CONTINUE options to the IF statement are valid within LOOP statements.

为了避免loop语句的无限次迭代，在loop语句中可以使用IF语句的新exit和CONTINUE选项。

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The previous example used just an empty loop, but what happens when the elements of the collection are accessed within the loop?

前面的例子使用了一个空循环，如果在循环中访问集合元素，会发生什么？

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The previous example used just an empty loop, but what happens when the elements of the collection are accessed within the loop?

前面的例子使用了一个空循环，如果在循环中访问集合元素，会发生什么？

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