1、迭代（Iteration）2、循环（Loop）3、递归（Recursion）4、遍历（Traversal）5、总结 1、迭代（Iteration）迭代（Iteration）指的是通过重复执行一组语句或操作来遍历集合中的每个元素的过程。Python中最常用的迭代方式是使用for循环。例如，我们可以使用迭代来遍历列表中的每个
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. (...
Definite Iteration: When we know how many times we wanted to run a loop, then we use count-controlled loops such as for loops. It is also known as definite iteration. For example, Calculate the percentage of 50 students. here we know we need to iterate a loop 50 times (1 iteration fo...
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...
我们可以用状态图来更直观地理解for循环的执行过程,以下是一个简单的状态图: next iterationfinishedexecute codeStartLoopEnd 在这个状态图中,循环的每次迭代执行完代码后都会进行判断,以决定是继续循环还是结束。 五、范围的灵活应用 使用for循环直接指定一个数的优点在于可以无限制地应用于不同场合。例如,我们可以通过...
languages = ['Swift', 'Python', 'Go'] # start of the loop for lang in languages: print(lang) print('---') # end of the for loop print('Last statement') Run Code Output Swift --- Python --- Go --- Last statement Here, print('Last statement') is outside the body of the...
During the first iteration, the value ofiwill be8, while in next it will be9and so on, uptill6, in the last iteration. Doing so, one can easily use these individual list element values inside the loop, as in our case, we have printed them. ...
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...
Python’s for loop allows you to iterate over the items in a collection, such as lists, tuples, strings, and dictionaries. The for loop syntax declares a loop variable that takes each item from the collection in each iteration. This loop is ideal for repeatedly executing a block of code ...
Exit the loop whenxis "banana", but this time the break comes before the print: fruits = ["apple","banana","cherry"] forxinfruits: ifx =="banana": break print(x) Try it Yourself » The continue Statement With thecontinuestatement we can stop the current iteration of the loop, and...