selfteaching / selfteaching/selfteaching-python-camp
Day04 while语句很容易死循环，或者直接不执行的原因（尤其是嵌套while语句）的解决方法
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Description
1、死循环的原因是“没有给（变量a）设置一个限制”，或者“没有让a跳出限制”，如a=a+1。。
2、while不执行的原因可能是条件限制太大
3、while1+while2语句这种嵌套式的语句，在while2执行完循环以后，在while2末尾如果没有给变量b赋一个初始值/置零等操作，如 在执行完b=b+1很多次后，没有执行b=0，也就是没有把变量b打回原形，就会导致只执行一次while2，且while1/2无法再次执行。造成程序死机卡住。
关键步骤：执行一次while后需要给变量赋值
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The issue body is the only supplied starting point and names no file, test, or entry point. Review the described while and nested-while cases, then identify the project location where this explanation belongs and define completion as a clear, accurate explanation with reproducible examples.
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