FizzBuzz!

Quick reference

• 00:04 In this video I want to take just a quick step back and sort of take all the things
• 00:08 we've learned so far and create this fun little FizzBuzz app.
• 00:12 FizzBuzz is sort of a traditional interview question.
• 00:15 You go in to get a coding job, they're going to ask you to do Fizz Buzz.
• 00:18 Well, not anymore, it use to be a very popular interviewing question, nowadays,
• 00:22 they do other interview questions because everybody knows Fizz Buzz, but
• 00:25 it's still a fun little thing to look at, that's what we're going to do.
• 00:28 So the idea of Fizz Buzz is you're told to print out all the numbers between 1 and
• 00:32 100 onto the screen.
• 00:34 And if a number is divisible by three, print out the word fizz if it's divisible
• 00:38 by five, print out the word buzz, if it's divisible by both three and
• 00:42 five print out fizz buzz, otherwise just print out the number.
• 00:45 If you think about it that sort of uses all the things we've learned so far loops,
• 00:49 if statements, else statements, eliff statements,
• 00:52 we can determine if a number is divisible by another number by using the modulus.
• 00:56 If a number is divisible It won't have a remainder, so the modules will be zero.
• 01:01 So we can do an if statement to test for that and find that out.
• 01:04 take just a minute to pause this video and sort of think through it yourself.
• 01:08 How would you do it, try and see if you can do it yourself because that's a fun
• 01:11 little test to give yourself to see if you can do it.
• 01:14 First things first, we're going to need a loop.
• 01:15 You can use any kind of loop you want, I kind of like while loop, so
• 01:18 I'm going to use a while loop.
• 01:19 So let's create our counter, let's call it count set it equal to 0,
• 01:24 then let's go while count is less than 100, and let's just print out our count.
• 01:30 And then of course, we have to be sure to increment our counter.
• 01:35 So then I'm getting an infinite loop, so
• 01:38 let's just run this 0 to 100, or up to 0 to 99.
• 01:41 Let's change this like this, run it again, I like to make little changes and
• 01:46 then run my code to see if there's any error.
• 01:49 Right now we saw, okay, now it's 100 by moving our account up,
• 01:53 so that's a good thing to do.
• 01:54 Get rid of that.
• 01:55 Now, let's do our if stuff.
• 01:56 First off, let's try and determine if a number is divisible by both 3 and 5.
• 02:00 So if count, modulus 3 = 0 and
• 02:07 count modulus 5 = 0.
• 02:13 Print and let's print out the number itself.
• 02:18 And then the word FizzBuzz and we've seen this before
• 02:23 we can do this percent sign to swap this in, okay?
• 02:28 So that looks good now elif, now, lets go and
• 02:31 do each one individually, so elif count modulus 3 = 0.
• 02:36 And I'm just going to copy this line and change this to FIZZ,
• 02:43 elif count modulus 5 = 0, don't forget our colons.
• 02:49 And you can wrap these guys like this if you want.
• 02:53 You don't necessarily have to sort of a matter of style.
• 02:56 Again, so if it's divisible by five we want BUZZ.
• 02:59 Okay, so far so good, and then finally else,
• 03:03 if it's not divisible by any of them let's just print out the number itself.
• 03:08 I think that's about it.
• 03:09 We just save this, now, let's run it and see how well we did.
• 03:12 Okay, so let's scroll back down and start at the beginning, 1, 2, 3,
• 03:17 3 is divisible by 3, so it prints out FIZZ!, so far so good.
• 03:21 4, 5 is divisible by 5, so it prints out BUZZ!,
• 03:24 we get another FIZZ!, another FIZZ!, a BUZZ!, FIZZ!.
• 03:29 Now, this is our first one where its both 15 is divisible by 3 and 5, so FIZZBUZZ!.
• 03:34 We can kind of eyeball this down to 30 is the next
• 03:40 one FIZZBUZZ!, FIZZBUZZ!, looking good.
• 03:45 I'm going to get to 100 BUZZ!, FIZZ!, and so there we go just like this.
• 03:47 Pretty simple but
• 03:48 you got to sort of think it through at least the first time you do it.
• 03:50 And it is a little tricky I like to start out with this testing for
• 03:53 both of them right at the beginning sort of knock that right out,
• 03:56 and then using elifs for the rest of them.
• 03:58 But think about yourself, think about trying to find a different way to do it,
• 04:02 try it with a for loop.
• 04:03 Can you do it with a for loop?
• 04:04 Try and do it with a while statement in a different way.
• 04:06 Can you do it with less code?
• 04:08 Can you do it with more code?
• 04:09 Just play around with it.
• 04:11 It's a nice little tool to test yourself and
• 04:13 sort of sharpen your skills that you've learned so far, so that's FIZZBUZZ.
• 04:17 In the next video, we're going to jump into functions.

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