Unlike for loops, the number of iterations in it may be unknown. ... Now, the inner while loop will be executed again (as b is 2 and b<=5), ... We are importing 'randint' function from 'random' library of Python. In Python, break and continue statements can alter the flow of a normal loop. If so, I’ll show how to create this type of loop using 4 simple examples. To start, here is the structure of a while loop in Python: while condition is true: perform an action In the next section, you’ll see how to apply this structure in practice. Loop through words Here we use the for loop to loop through the word computer word = "computer" for letter in word: print letter Output c o m p u t e r While Loop The while loop tells the computer to do something as long as the condition is met. I decide to modify the following while loop and use it inside a function so that the loop can take any value instead of 6. i = 0 numbers = [] while i < 6: numbers.append(i) i += 1 I created the following script so that I can use the variable(or more specifically argument ) instead of 6 . Perform a simple iteration to print the required numbers using Python. When do I use them? indentation: The code in the body of the while loop needs to be indented. Now the value of x is 1 which is less than 4. 2. Its construct consists of a block of code and a condition. When do I use for loops? Python "while" Loops (Indefinite Iteration) A while loop repeats code until the condition is met. Loop through words Here we use the for loop to loop through the word computer word = "computer" for letter in word: print letter Output c o m p u t e r While Loop The while loop tells the computer to do something as long as the condition is met. What is the use of break and continue in Python? conditional statement: Followed by the while keyword is a conditional statement. The code inside the else clause would always run but after the while loop finishes execution. A while loop always consists of a … CodesDope : Learn while loop in Python. This continues till x becomes 4, and the while condition becomes false. colon: At the end of the conditional statement is a colon to tell the program that what follows is the code that needs to be iterated over. If the condition is initially false, the loop body will not be executed at all. Most loops contain a counter or more generally variables, which change their values in the course of calculation. Let’s create a small program that executes a while loop. Python break, continue and pass Statements - You might face a situation in which you need to exit a loop completely when an external condition is triggered or there may also be a situation when you want to The Python for statement iterates over the members of a sequence in order, executing the block each time. Usage in Python. Loop through each element of Python List, Tuple and Dictionary to get print its elements. for loops are traditionally used when you have a block of code which you want to repeat a fixed number of times. In this program, we’ll ask for the user to input a password. Once the code is not indented anymore the while loop … The one situation when it won’t run is if the loop exits after a “break” statement. Learn about break and continue in Python . Use the while loop with the syntax as given below. The while loop is used extensively in Python and alone with for and if-else loops, forms the basis of manipulating data in the […] For example the following code never prints out anything since before executing the … Python break, continue and pass Statements - You might face a situation in which you need to exit a loop completely when an external condition is triggered or there may also be a situation when you want to.