The simplest flow control statement is the if statement, whose basic syntax is demonstrated in the pseudocode shown in Listing 4.
最简单的流控制语句是 if 语句，它的基本语法在清单 4 中的伪代码中演示了。
The XForms statement in Listing 3 binds the input control to a particular element in an XHTML document.
清单3中的xforms语句将输入控件绑定到XHTML文档的特定元素。
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