![]() In other cases, it is not so easy to tell. Increments each time through the loop, so eventually it will have to equal The value of len(name) is finite, and we can see that the value of pos In the case here, we can prove that the loop terminates because we know that The directions on shampoo, lather, rinse, repeat, are an infinite loop. Loop will repeat forever, which is called an infinite loop.Īn endless source of amusement for computer programmers is the observation that The body of the loop should change the value of one or more variables so thatĮventually the condition becomes false and the loop terminates. The body consists of all of the statements below the header with the same If the condition is true, execute each of the STATEMENTS in the body and If the condition is false, exit the while statement and continue The flow of execution for a while statement works like this:Įvaluate the condition ( BOOLEAN EXPRESSION), yielding False or The name was", name + "." ) else : print ( " \n Great, you got it in", pos + 1, "guesses!" ) ", end = '' ) guess = input ( "Guess again: " ) pos = pos + 1 if pos = len ( name ) and name != guess : print ( "Too bad, you couldn't get it. ![]() Try to guess it: " ) pos = 0 while guess != name and pos < len ( name ): print ( "Nope, that's not it! Hint: letter ", end = '' ) print ( pos + 1, "is", name + ". Name = 'Harrison' guess = input ( "So I'm thinking of person's name. The following program outputs a sequence of values in the left columnĪnd 2 raised to the power of that value in the right column: ![]() In the table the Intel Pentium processor chip used to perform floating-pointĪlthough a log table is not as useful as it once was, it still makes a goodĮxample. In some cases, there have been errors in the underlying tables, most famously For some operations, computers use tables of values to get anĪpproximate answer and then perform computations to improve the approximation. Soon thereafter,Ĭomputers and calculators were so pervasive that the tables became obsolete. Is great! We can use the computers to generate the tables, so there will be noĮrrors.” That turned out to be true (mostly) but shortsighted. When computers appeared on the scene, one of the initial reactions was, “This The tables was slow and boring, and they tended to be full of errors. To make that easier, mathematicsīooks contained long tables listing the values of these functions. Were readily available, people had to calculate logarithms, sines and cosines,Īnd other mathematical functions by hand. One of the things loops are good for is generating tables. i is now 0 i is now 1 i is now 2 i is now 3 i is now 4 > 4.6. True, and something else to happen when it is false. It is frequently the case that you want one thing to happen when a condition it On configuring vim to run pep8 on your source code with the push of a Installable as a package on Debian based GNU/Linux systems like Debian.Ĭonfiguring Debian for Python Web Development, there is instruction To help us learn to write well styled Python code, there is a programĪutomatic style guide checker for Python source code. This (and the other PEP 8 recommendations) in this book. PEP 8 recommends the use of 4 spaces per indentation level. Process the Python community uses to discuss and adopt changes to the The Python Enhancement Proposals, or PEPs, are part of the The Python community has developed a Style Guide for Python Code, usually referred to simply as ![]() Check out my post on 21 Python for Loop Examples.Indentation and the PEP 8 Python Style Guide Finding the factorial of a given number using while loop n = int(input("Enter the number: ")) Print("Sum of even numbers till n:",sum) 18. Finding the sum of even numbers using while loop i = 0 Reversing a number using while loop in Python n = int(input("Enter a number: ")) Finding the multiples of a number using while loop n = int(input("Enter an integer: ")) Printing the square of numbers using while loop n = 1 Print("Average of given Numbers:",average) 14. Finding the average of 5 numbers using while loop p = 5 Example of using while loops in Python n = 1 Check out these examples to get a clear idea of how while loops work in Python. In this post, I have added some simple examples of using while loops in Python for various needs. The syntax of a while loop is as follows: while condition: The loop will stop its execution once the condition becomes not satisfied. The while loop checks a condition and executes the task as long as that condition is satisfied. In Python programming, we use while loops to do a task a certain number of times repeatedly.
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