In computer science, afor-loop(or simplyfor loop) is a control flow statement for specifying iteration, which allows code to be executed repeatedly。(作用:介绍了for循环是什么?) A for-loop has two parts: a header specifying the iteration, and a body which is executed once per iteration. (...
In computer science, afor-loop(or simplyfor loop) is a control flow statement for specifyingiteration, which allows code to be executed repeatedly。(作用:介绍了for循环是什么?) A for-loop has two parts: a header specifying the iteration, and a body which is executed onceper iteration. (for...
Incomputer science, afor-loop(or simplyfor loop) is acontrol flowstatementfor specifyingiteration, which allows code to beexecutedrepeatedly。(作用:介绍了for循环是什么?) A for-loop has two parts: a header specifying the iteration, and a body which is executed once per iteration. (for循环是什...
Incomputer science, afor-loop(or simplyfor loop) is acontrol flowstatementfor specifyingiteration, which allows code to beexecutedrepeatedly。(作用:介绍了for循环是什么?) A for-loop has two parts: a header specifying the iteration, and a body which is executed once per iteration. (for循环是什...
在Python中的while或者for循环之后还可以有else子句,作用是for循环中if条件一直不满足,则最后就执行else语句。 foriinrange(5): ifi==1: print'infor' else: print'inelse' print'afterfor-loop' #infor #inelse #afterfor-loop 但我们发现if条件在循环的过程中成立了,最终还是执行了else语句里的内容,这是为...
5、while+else #与其它语言else 一般只与if 搭配不同,在Python 中还有个while ...else 语句,while 后面的else 作用是指, 当while 循环正常执行完,中间没有被break 中止的话,就会执行else后面的语句
深入理解python中的for循环 Python中的for语句,没你想的那么简单~ for语句实际上解决的是循环问题。在很多的高级语言中都有for循环(for loop)。for语句是编程语言中针对可迭代对象的语句,它的主要作用是允许代码被重复执行。看一段来自维基百科的介绍: Incomputer science, afor-loop(or simplyfor loop) is a...
for语句实际上解决的是循环问题。在很多的高级语言中都有for循环(for loop)。 for语句其实是编程语言中针对可迭代对象的语句,它的主要作用是允许代码被重复执行。看一段来自维基百科的介绍: Incomputer science, afor-loop(or simplyfor loop) is acontrol flowstatementfor specifyingiterati...
第三种,Python的for循环有else关键字,可以利用else和 comtinue、break跳出循环 defttt():foriinrange(10):forjinrange(10):ifi+j>15:print(i, j)breakelse:continuebreakttt() 这段代码什么意思呢 python里面for...else...表示如果这个循环正常的走完了则会执行else里面的代码,异常退出则不会执行,我们对内...
else: print("未提前退出循环") ``` 第二步:使用异常处理实现外部退出 另一种方法是在循环内部抛出异常,并在外部捕获该异常来实现提前退出循环的效果。以下是一个示例: ```python class BreakLoop(Exception): pass try: for i in range(10):