Python学习笔记之Break和Continue用法分析-创新互联

本文实例讲述了Python学习笔记之Break和Continue用法。分享给大家供大家参考，具体如下：

Python 中的Break 和 Continue

• break：控制何时循环应该结束
• continue： 跳过循环的一次迭代

Break 和 Continue[示例练习]

用 break 语句写一个循环，用于创建刚好长 140 个字符的字符串 news_ticker。你应该通过添加 headlines 列表中的新闻标题创建新闻提醒，在每个新闻标题之间插入空格。如果有必要的话，从中间截断最后一个新闻标题，使 news_ticker 刚好长 140 个字符

headlines = ["Local Bear Eaten by Man",
       "Legislature Announces New Laws",
       "Peasant Discovers Violence Inherent in System",
       "Cat Rescues Fireman Stuck in Tree",
       "Brave Knight Runs Away",
       "Papperbok Review: Totally Triffic"]
news_ticker = ""
for item in headlines:
  news_ticker += item + " "
  if len(news_ticker) >= 140:
    news_ticker = news_ticker[:140]
    break
print(news_ticker) # Local Bear Eaten by Man Legislature Announces New Laws Peasant Discovers Violence Inherent in System Cat Rescues Fireman Stuck in Tree Brave
print(len(news_ticker)) # 140