The capability is checked against null in the first part of the if clause.

功能是根据 if 语句的第一部分获得的。

The if clause determines whether the value of the ResponseRequested sub-element for a given comment is equal to Yes.

if 子句判断一条给定评论的 ResponseRequested 子元素的值是否等于 “Yes”。

If we got an if then statement are we asserting an antecedent, an if clause or the consequent, Q the then clause, or are we saying if P then Q.

如果我们的论述中有如果,我们在主张先行词，假设条件句或者结果，然后从句，或者我们说如果P那么。

The expression used in the if statement (and in the elif clause and the while loop discussed later in this article) can be as complex as necessary.

if语句(以及本文后面讨论的elif子句和while循环)中的表达式可以很复杂。

When the if clause has more than one condition, you can choose to have it evaluate to true when any of the conditions are true or when all of the conditions are true.

当 if 子句有多个条件时，您可以选择让它在任何条件为 true 时求值为 true，或者在所有条件都为 true 时才求值为 true。