下标在Python编程中是从0开始依次按顺序向后分配的，比如一个字符串str1 = ’abcde’，那么字符a的下标就是0，字符b的下标是1，字符c的下标是2，字符d的下标是3，字符e的下标是4。

字符串是Python中最常用的数据类型，我们一般使用引号来创建字符串，创建字符串很简单，只要为变量分配一个值即可，后面python入门教程还会学到关于字符串的下标、切片、常用操作方法。

一、语法 {代码...} 所谓else指的是循环正常结束后要执行的代码，即如果是bresk终止循环的情况。else下方缩进的代码将不执行。二、示例代码如下： {代码...} 执行结果：三、退出循环的方式下面主要讲的是当for和else配合使用的时候如果遇到break终止循环和continue退出循环，else的代码是否执行。Break是终止循环，一旦...

思考：以上最后的print是不是即使没有循环也能执行，所以以上循环如果没完成，最后的print照样会执行，那么以上代码是不符合的。正确的是以上循环和下面的print会有依赖关系的，只有以上的5遍循环结束了才可以打印媳妇原谅我了。

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