当然，也可以反向而不是正向运行循环，或者使用1之外的循环计数器增量，甚至像while语句那样完全取消循环计数器。

Of course, you can run loops backward instead of forward, or increment the loop counter by something other than 1, or even eliminate the loop counter completely as you do in a while statement.

youdao

探讨利用中规模计数器芯片设计按非自然顺序循环的任意进制计数器方法，该方法在特殊循环计数器设计的应用中，有着广泛的应用。

The method of design of arbitrary cany counter of unnatural sequence circulation by use of medium - scale counter core is discussed. It finds wide application in the special circulation counter.

youdao

And obviously, that ought to involve the variable in some way, or it's not going to make a lot of sense, so this includes the variable, since that's the thing that's changing.

很明显，这跟计数器的变量有某种关系,否则的话就没多大意义了,因此这跟计数器有关，因为它正是每次循环改变的东西。

麻省理工公开课 - 计算机科学及编程导论课程节选