循环语句主要用来实现算法中的循环结构,处理反复执行的运算任务,如累加求和、累乘求积等.但是,解决具体的构造循环语句的算法问题时,要尽可能地减少引入循环变量,应使循环嵌套的层数尽可能少,否则会使设计的程序比较麻烦,并且使计算机占用大量的系统资源或浪费计算机的系统资源.举例说明如下: The loop statement is mainly used to implement the loop structure in the algorithm, and to deal with repeatedly performed computation tasks, such as summation, accumulation and multiplication, etc. However, when solving the algorithmic problem of constructing the loop statement, it is necessary to reduce the introduction loop as much as possible. Variables should minimize the number of nested layers of the loop, otherwise it will make the design of the program more cumbersome, and make the computer use a lot of system resources or waste computer system resources. Examples are as follows: