Let's go over the solution of how to create a circle out of squares. In case you missed it, here are the previous parts of the series: Python for Beginners, Part 1: How to Download and Install Python Python for Beginners, Part 2: Hello World Exercise Python for Beginners, Part 3: The Turtle Module Python for Beginners, Part 4: Interactive Shell vs. Script Python for Beginners, Part 5: Variables Python for Beginners, Part 6: Strings Python for Beginners, Part 7: Fun Fun Functions Python for Beginners, Part 8: Function Arguments Python for Beginners, Part 9: Loops Python for Beginners, Part 10: Primitive Data Python for Beginners, Part 11: String Slicing Python for Beginners, Part 12: List of Things Python for Beginners, Part 13: Append List-Method Python for Beginners, Part 14: PROJECT-1 Circle of Squares Transcript 0:00 okay in the last video I proposed a 0:01 challenge to you make a square out make 0:03 a circle out of squares so hopefully you 0:06 give it a try 0:07 hopefully you've put it in the comments 0:10 below, okay so if you're watching this 0:11 video right now whatever you got I don't 0:13 care if it's crap I don't care what 0:15 it is I want you to put it in the 0:17 comments below 0:18 okay so whether you go 0:23 to my website at clever programmer comm 0:27 and put it in learn Python for beginners 0:31 we have a comment section so for example 0:33 you can go into one of these videos I'm 0:37 gonna have this video up there as well 0:39 when you guys come to watch I want you 0:41 to put your code in the comments below I 0:42 will look at it personally and one of 0:45 our members will also look at it okay 0:47 so right over here or you can just put 0:50 it on the YouTube channel that's totally 0:52 fine as well 0:53 alright so let's get to it first of all 0:57 what I want to do is I have the square 1:00 function which is really cool but it's 1:03 really repetitive right it does um 1:07 I mean if you can see all all a square 1:09 is is you move forward and you turn 1:12 right and you repeat that four times 1:13 right so why do we have it here like 1:16 this this is really bad um there's a lot 1:21 of redundancy in our logic right um like 1:26 if you were telling your sister your 1:29 brother your dad your friend whoever D 1:31 steps you would be like move forward 1:32 turn right and then do that four times 1:34 that's how you would tell it to them 1:36 okay 1:36 you wouldn't say move forward turn right 1:38 move forward turn right ah move forward 1:43 and then turn right and oh yeah move 1:46 forward and turn right right so you 1:47 wouldn't do that so if we look at this 1:49 actually we're doing the step once here 1:52 then we're doing the same step twice 1:55 here then we're doing the same step 1:58 three times here and we're doing the 2:01 same step four times here what does that 2:05 mean when we're doing something over and 2:07 over again well it sounds like a loop so 2:11 I want this thing to happen for 2:13 how do I sit do something in four times 2:16 in Python I just say for something in 2:18 range so I'll say for I in range for 2:20 that's it this will do that thing four 2:24 times and I'll simply go here and remove 2:27 that code 2:28 okay so already our code looks much 2:33 nicer and that's a way better way of 2:36 making a square okay so notice it still 2:41 takes length and angle so if we're 2:44 making a function we need to pass those 2:45 variables length and angle right so then 2:48 length here and angle here can become 2:50 those so we want like let's say length 2:52 to be 100 and our angle to be 90 degrees 2:55 so square makes a square let's verify 2:59 our hypothesis here and remember this 3:02 function all functions you got to put 3:05 open closed parenthesis after them and 3:07 you got to pass in an argument for this 3:10 function here so we're gonna say 100 for 3:12 the length and I'm gonna say 90 for the 3:14 angle okay I can also say it like this 3:17 just so the code is you know more clear 3:20 what it's doing okay I can say it like 3:25 that but let's keep it keep it short and 3:27 sweet here let's run it and that should 3:31 make a square right it made a square 3:33 great mmm 3:35 now what we're going to do is well we 3:38 want to keep making squares right so we 3:41 know we're going to put it in some kind 3:42 of loop let's say we want to do it 100 3:45 times okay 3:49 alright so I'm gonna put it in the loop 3:51 because I want to make a lot of squares 3:54 and each time I make a square I want to 3:57 turn so let me first get out of this 3:59 loop and let me do this let me say my 4:03 turtle dot right ninety degrees okay and 4:08 let me do this now and you'll see that 4:12 as soon as I make that I turn a turn a 4:14 little bit actually not ninety degrees 4:16 let's turn I don't know ten degrees 90 4:21 degrees is silly so I make a square and 4:23 then I turn just like that I'm ready to 4:25 make another square so let's do that 4:27 let's make another square right here I 4:32 make a square I turn a little bit I make 4:34 another square okay you get the idea now 4:37 we need this process to repeat a lot of 4:39 times so we need to make a square and we 4:41 need to turn right right so it's really 4:42 this step and we want to do it again and 4:46 again and again and again so sounds like 4:48 we need to put it in a loop let me 4:50 uncomment that line hit tab to indent it 4:54 under the for loop so it knows it's a 4:56 part of a for loop this variable here 4:59 does not need to be called I by 5:00 convention in the world of Python we 5:03 usually call it I you call it bananas 5:06 you can call it that you can call it an 5:07 underscore you can call it whatever you 5:09 want okay just a little bit about 5:12 variables variables can't start with the 5:14 number like five or something okay 5:17 so perfect this looks pretty good let's 5:21 give it a try okay I make a square I 5:26 turn a little bit I make another square 5:28 I turn a little bit I make another 5:29 square I turn a little bit beautiful 5:31 that's looking really good let me close 5:34 this let me make the speed really fast 5:36 so let me make this seis turtle that's 5:39 speed zero and that makes it run really 5:41 really fast so it's going and going and 5:46 going and going and going and going and 5:49 going 5:49 but now notice the problem it's not 5:54 drawing anything new but it's moving hmm 5:59 so it's moving a lot but it's not make 6:02 anything new where does it stop making 6:05 new things let's check it out let's say 6:08 we want to do this how many times let's 6:10 say we want to do this 30 or let's say 6:15 we want to do this loop 40 times let's 6:18 take let's check it out so let's see 6:20 where it stops making it new so the last 6:25 four times it ran you guys probably 6:27 didn't catch it but the last four times 6:29 that ran it actually didn't make 6:30 anything new so the 37th time it ran 6:32 didn't make anything new 38 times 39th 6:34 time and 40th time so what the heck 6:37 happened well here's what happened three 6:41 hundred and sixty degrees right those 6:44 that's the number of degrees in a circle 6:46 so a circle has 360 degrees now we want 6:52 to make this circle like really nice and 6:56 dense we don't want it to be how it was 6:59 it our circle look pretty empty and the 7:03 reason is okay so the circle has 360 7:05 degrees now if we're turning ten degrees 7:09 every single time right what's 360 7:13 divided by ten that's how many times we 7:16 can go in a direction if we turn right 7:19 only ten degrees is 360 divisible by 10 7:23 and the answer is yes and the answer is 7:26 actually 36 right 360 divided by 10 7:32 obviously you don't have to be a math 7:33 genius and all that but you get back 36 7:36 which means 10 perfectly goes into 360 7:39 and isn't that awesome 7:42 that that's the number of times you can 7:45 actually make unique squares if you do 7:47 if you choose 10 degrees 7:48 it's beautiful seeing divisibility in 7:51 visualizations so even math starts to 7:53 become beautiful when you put it in 7:55 terms of computer programming you guys 7:57 this was one of my most favorite 7:59 discoveries and I still get excited when 8:01 I think about this I think that's pretty 8:03 freaking awesome what can we do well 8:07 pick a number that is not divisible 8:10 right that 360 is not divisible by so 8:14 how about 8:15 great number I don't know like a prime 8:19 number and what's a prime number that's 8:21 really close to ten eleven so let's pick 8:24 eleven right because 360 divided by 8:28 eleven gives you something that's not 8:31 divisible right like three hundred six 8:33 is not divisible by 11 8:34 eleven is a prime number so let's run 8:37 this bad boy and check it out and let's 8:39 run it a hundred times right not forty 8:41 hundred times and let's check it out 8:47 starting eleven degrees every time it 8:49 makes a square you'll notice that it 8:51 almost never repeats itself and they'll 8:54 probably never repeat itself and it just 8:56 keeps making a circle darker and darker 8:58 and darker and denser and that's how you 9:01 want it right look at how beautiful that 9:04 looks 9:05 dark in the middle and starts to get 9:08 lighter on the outer edges and those 9:10 webs are interweaving and it's gorgeous 9:13 right bonus bonus project I can give you 9:17 guys for this is bring some colors out 9:20 make some cool designs go look up 9:22 trinket dot IO go to that website check 9:26 it out um look at some examples paste 9:29 your code below you can help out other 9:32 people I can help you out if I look at 9:36 your code you have some errors or it 9:39 looks really cool and maybe I can help 9:41 you make it look even better or maybe 9:43 you'll just make something that will 9:44 blow my mind because I haven't made such 9:46 beautiful circles out of squares anyways 9:50 I hope you guys enjoyed it I hope it 9:52 makes sense please like the video 9:54 subscribe I'll see you in the next 9:56 lesson

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Python for Beginners, Part 15: Solution Circle of Squares (Exercise)

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Python for Beginners, Part 15: Solution Circle of Squares (Exercise)

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