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...
languages = ['Swift','Python','Go']# start of the loopforlanginlanguages:print(lang)print('---')# end of the for loopprint('Last statement') Run Code Output Swift --- Python --- Go --- Last statement Here,print('Last statement')is outside the body of the loop. Therefore, thi...
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: In computer science, a for-loop (or simply for loop) is a control flow statement for specifying iteration, which allows code to be executed ...
This is where a nested for loop works better. The first loop (parent loop) will go over the words one by one. The second loop (child loop) will loop over the characters of each of the words. words=["Apple","Banana","Car","Dolphin"]forwordinwords:#This loop is fetching word from...
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 acontrol flowstatementfor specifyingiteration, which allows code to be...
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 acontrol flowstatementfor specifyingiteration, which allows code to beexecutedrepeatedly。(作用:介绍了for循环是什么?) ...
codes for loop else: if exit loop normally then run these codes... foriina: ...ifi =='c': ...print("'c' stands for 'cease'") ...break...print(i) ...else: ...print('This loop has ended normally.') ... a b'c'standsfor'cease'#循环没有正常结束,没有返回预先写好的提示fo...
在使用嵌套for循环进行比较的情况下,使用set加速498x # Summary Of Test Results Baseline: 9047.078 ns per loop Improved: 18.161 ns per loop % Improvement: 99.8 % Speedup: 498.17x 4、跳过不相关的迭代 避免冗余计算,即跳过不相关的迭代。 # Example of inefficient code us...
NUMBERSintidintvalueLOOPstringconditionstringactioniterates 在图中,NUMBERS代表我们遍历的数字列表,而LOOP代表我们在for循环中进行的每一次迭代和条件判断。 其他跳出循环的方法 除了使用break语句外,还有其他方法可以停止循环。例如,可以使用布尔变量控制循环的继续与结束。以下是一个示例: ...
foriinrange(3):print(i)else:print('loop ends')foriinrange(3):ifi>1:breakprint(i)else:print('loop ends') 猜猜这段代码的输出吧,如果没有把握就亲自执行一下就明白了。 总结 循环是程序中另外一种重要的流程控制,在批量处理数据、服务器程序中大量使用。