Example 1: Looping Through a ListThe first example involves looping through a list of integers using a for loop. Here’s how it works:for num in numbers: print(num) # 1 # 2 # 3 # 4 # 5In this example, we have a list of integers called numbers. The for loop iterates over each...
Aloopis a sequence of instructions that is continually repeated until a certain condition is reached. For instance, we have a collection of items and we create a loop to go through all elements of the collection. In Python, we can loop over list elements with for and while statements, and...
Let’s say we have a list of numbers and we want to check if a number is present or not. We can iterate over the list of numbers and if the number is found, break out of the loop because we don’t need to keep iterating over the remaining elements. In this case, we’ll use ...
rangeproduces a list in memory and then theforloop loops over the list. Both create a list of 6 integers in memory and then iterate over each number, raise it to power 2 and then print. Thus, both the loops do exactly the same thing in exactly the same way! Pythonic way: Use xrange...
In Python, we use a for loop to iterate over sequences such as lists, strings, dictionaries, etc. For example, languages = ['Swift', 'Python', 'Go'] # access elements of the list one by one for lang in languages: print(lang) Run Code Output Swift Python Go In the above example...
for[first iterating variable]in[outer loop]:# Outer loop[do something]# Optionalfor[second iterating variable]in[nested loop]:# Nested loop[do something] Copy 程序首先遇到外循环,执行第一次迭代。第一次迭代触发内部嵌套循环,然后运行完成。接下来程序返回到外部循环的顶部,完成第二次迭代并再次触发嵌套...
Example: Print first 10 numbers using a for loop Here we used the range() function to generate integers from 0 to 9 Next, we used theforloop to iterate over the numbers produced by therange()function In the body of a loop, we printed the current number. ...
running = False # this causes the while loop to stop elif guess < number: print('No, it is a little higher than that') else: print('No, it is a little lower than that') else: print('The while loop is over.') # Do anything else you want to do here ...
If we use it with a file, it loops over lines of the file.>>> for line in open("a.txt"): ... print(line, end="") ... first line second line So there are many types of objects which can be used with a for loop. These are called iterable objects....
Run a task multiple times by usingwhileloops. Loop over list data by usingforloops. Start Add Add to Collections Add to Plan Prerequisites Basic Python programming knowledge, including the use of variables, strings, integers, and math.