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This cookie is set by GDPR Cookie Consent plugin. The cookie is set by GDPR cookie consent to record the user consent for the cookies in the category "Functional". The cookie is used to store the user consent for the cookies in the category "Analytics". These cookies ensure basic functionalities and security features of the website, anonymously. Necessary cookies are absolutely essential for the website to function properly. The loop will check the condition each time before it repeats to make sure the condition is still true. If your condition starts out as false, then your loop will never run. To use a while loop you need to set up a condition that starts out as true. In this case, the music would stop as soon as everyone left the party or if it is past midnight. While (guests at party > 0) and (time
Now you can describe your party as this loop. What if you also want your music to stop playing when it gets later than midnight? You can program while loops to end the loop based on multiple conditions using logic. You could describe your party as this loop: You’re having a party and you want the music to keep playing until all your guests leave. You can think of while loops as telling your app “ while this happens, repeat this” or “ while this hasn’t changed, repeat this”. The reason they are called while loops because the code will repeat while a condition is still true. While loops are loops that will continue to run while a condition is true. In App Inventor and Thunkable, for loops look like this: In most scenarios, you’ll want the counter to increase by 1 each time the loop repeats. You also set how much the counter goes up by each time the code repeats. You control how many times the loop repeats by setting where the counter starts and ends. You can think about for loops as telling your app, “repeat this, for 17 times” or “repeat this, for 5 times”.įor loops use a variable to count how many times the code has been repeated, called a counter. The reason they are called for loops is that you can tell your app how many times you want it to repeat to the code for. Let’s go through each of them in more detail.įor loops will repeat a block of code a set number of times. You’ll also learn about for each loops which are a type of for loop that repeats once for each item in a list. While loops will repeat while a condition is true, and for loops will repeat a certain number of times. There are two types of loops, “while loops” and “for loops”. A loop is a block of code that will repeat over and over again. You can take advantage of this by using loops. This is a perfect task for a computer, which would be able to do it really fast and without any mistakes. This might take you a long time, and you might make a few mistakes along the way. Imagine you were asked to write your name down 100 times in a row. Computers are really good at doing things over and over again, and doing them fast. Loops are a way to tell a computer to do something many times in a row. In this lesson, you’ll learn about loops.
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