python num = int(input("请输入一个正整数：")) num_str = str(num) for i in range(len(num_str)): if (i + 1) % 2 == 0: print(num_str[i])
这段 Python 代码的作用是：首先要求用户输入一个正整数，然后将其转换为字符串。接着通过一个循环遍历这个字符串，对于字符串中索引值加 1 后为偶数的字符进行打印输出。 例如，如果用户输入 12345 ，那么会打印出 2 和 4 。你是对这段代码的功能、语法或者逻辑有什么疑问，还是希望基于这段代码进行修改或拓展呢？ [2024-10-29 13:27:32 | AI写代码神器 | 99点数解答]
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