Certainly the entire method is not illustrated: the else clause is missing.

当然没有显示全部方法：缺少了else子句。

youdao

You may have noticed the else clause and the last two examples in Listing 9.

在清单9中可能注意到else子句和最后的两个示例。

youdao

When I check the else clause, I see that I was calculating age based on the year only.

在检查完 else 子句之后，我明白我只是根据年来计算年龄。

youdao

All right, if this is purely a test of, if this is true do this otherwise I don't care, I don't need the ELSE clause in there to identify it. All right?

好，如果这真是一个测验，用来测试如果是真的那么进行一些操作,否则的话我不在乎，那么我不需要ELSE语句,来进行声明了对不对？

麻省理工公开课 - 计算机科学及编程导论课程节选