This is true as the above derivation for a and b of opposite parity is an if and only if statement.
这是正确的，因为上面对a和b 的奇偶性的推导是一个当且仅当命题。
They are equivalent to the IF statement used with DB2.
它们与DB 2中使用的IF语句等效。
You could do that using an if statement (see Listing 12).
应该使用if语句进行此工作(请参见清单12)。
Lisp also handles conditional constructs such as the if statement.
Lisp也处理条件结构，如if语句。
Listing 2 shows an example procedure that contains an IF statement.
清单2展示了一个包含IF语句的示例过程。
The if statement on line #1 compares the values of variables a and b.
第 1行上的if 语句将比较变量a和b的值。
The first if statement evaluates True, because 5 isn't evenly divisible by 25.
第一个if语句计算为True，因为5不能被25整除。
This time the variable I becomes 125, and the first if statement evaluates False.
这次变量i变成了125，并且第一个if语句计算为False。
If so, the if statement executes a syntax off; otherwise it executes a syntax enable.
如果是的话，if语句将执行一个syntaxoff命令；否则它将执行syntax enable命令。
It's a safe bet that in a script this small, the error may be in the actual if statement.
对于这个小脚本，可以很有把握地猜测错误可能出现在实际的if语句中。
Thinking back to basic shell scripting logic, an if statement consists of if, then, and fi.
回忆一下基本的脚本编程逻辑：if语句由if、then和fi组成。
Although you can do everything with a single XPath if statement, the code will be unwieldy.
虽然您可以使用一个XPathif 语句实现任何操作，但是代码显得有些笨拙。
This check is part of an XSL: if statement rather than a predicate in the match expression.
该检查是xsl：if语句而不是match表达式中谓词的一部分。
Accomplishing it is as simple as throwing an IF statement inside of our intercepting filter.
完成这一点可以简单到在我们的拦截过滤器中放一个IF语句。
Finally, there is an if statement that performs some cleanup on the tag output on the report.
最后，有一个if声明，会在报告上的标签输出执行一些清洁工作。
Say we wanted to write a more verbose version of the if statement than the one Scheme offers.
假设我们想编写一个比Scheme 提供的版本更详细的if 语句版本。
The solution provided is remarkably simple: you add an extra if statement to the else clause.
提供的解决方案非常简单：给else子句添加一个额外的if语句。
The result is an else if statement, which is shortened to elif, as demonstrated in Listing 6.
结果是一个elseif语句，简写为elif，如清单6所示。
Another new feature in Eclipse Galileo is the ability to generate blocks for the if statement.
EclipseGalileo中的另一个新特性是为if语句生成代码块的能力。
The problem isn't entirely in the if statement, but mostly in the amount of code in the if statement.
问题并不完全归结在if语句上，if 语句中代码的数量才是最关键的。
As an example, let's examine the parsing of an if statement whose syntax look like the following.
作为一个示例，让我们来解析一个if语句，它的语法如下所示。
Because of that, the if statement in this example says: "Execute the 'echo' only if there were errors."
正因为如此，这个例子中所陈述的if说：“只有当错误出现时才执行'echo '。”
To get past the last IF statement we simply populate the password with the user name in case of SSO.
为了通过最后一个IF语句，只需对于sso用用户名填充密码。
The case statement is another conditional statement that you can use in place of using an if statement.
case语句是另一种条件型语句，您可以用该语句来替代if 语句。
This error says that there's a problem in line 12, but the line only has a fi completing the if statement.
错误消息指出问题出现在第12行上，但是这一行只有一个用来结束if语句的fi。
The next if statement will remove the trailing "any word character section" to produce (s)(\w)+(m)(\w)+(l).
接下来的if 语句将删除后置的 “任何字符部分”以生成 (s)(\w)+(m)(\w)+(l)。
The if statement, which executes a particular block of statements based on the result of a test expression.
if语句，它基于测试表达式的结果执行一个特定的语句块。
The last if statement is never executed and is used to demonstrate how the pass statement is coded in a program.
最后一个if语句永远不会执行，只是用于演示如何在程序中编写pass语句。
By the way, notice the comments asserting what invariant we expect to hold in the body of each if statement.
顺便注意一下断定每个if语句正文中希望保留的不变量的注释。
If statement execution returns an error, the procedure is automatically aborted or the transaction is rolled back.
如果语句执行返回一个错误，过程将自动中断或回滚事务。
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