How To Use Functions In Python (Python Tutorial #3)
ฝัง
- เผยแพร่เมื่อ 5 มิ.ย. 2024
- This entire series in a playlist: goo.gl/eVauVX
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Tips:
1. Follow along as I explain to make sure you understand everything
2. Ideally, work with a friend so you can help each other when you’re stuck
3. If you want to learn faster than I talk, I’d recommend 1.25x or 1.5x speed :)
4. Check the outline in the comment section below if you want to skip around.
5. Download the sample files here to follow along (they are Jupyter Notebook files): www.csdojo.io/python3
6. To make sure you don’t miss my future tutorial videos, sign up to my newsletter: www.csdojo.io/news
7. Have fun! If anything is unclear, please let me know in a comment.
Keep in touch on Facebook: / entercsdojo
Subscribe to my newsletter: www.csdojo.io/news
Support me on Patreon: / csdojo
Below is an outline of this video.
0:41: How to use sample files
1:41: Using comments
2:21: What’s a function? - Example 1
4:57: What’s a function? - Example 2
7:09: A function that takes multiple arguments
7:58: What’s a function? - 2 more examples
10:30: Creating a BMI calculator
Also, a few tips:
1. Here is the playlist for this series: th-cam.com/video/Z1Yd7upQsXY/w-d-xo.html
2. Follow along as I explain to make sure you understand everything
3. Ideally, work with a friend so you can help each other when you’re stuck
4. If you want to learn faster than I talk, I’d recommend 1.25x or 1.5x speed :)
5. Check the outline in the comment section below if you want to skip around.
6. Download the sample files here to follow along (they are Jupyter Notebook files): www.csdojo.io/python3
7. To make sure you don’t miss my future tutorial videos, sign up to my newsletter: www.csdojo.io/news
8. Have fun! If anything is unclear, please let me know in a comment.
local host... did you make all that?
Love from india
Helpful videos
Again i hit like for your video..
Ur something thanks
Hi YK ,
In india we are not taught what we want . There is useless matter in our syllabus. Even many people with master degree in computer science can't create any simple application without any GUI interface help and swing controls. They teach us for marks not for knowledge.
Should I learn computer science online leaving my school ?
men i watch every advertisement that comes out to my screen just to be fair by teaching us for free..your awesome men
Eman JavaScript watching the entire ad wont give him more revenue but a nice act nevertheless
It only gives revenue to TH-cam or something I guess
Aarohan Sharma it doesn’t matter how long you watch the ad it’s per view, doesn’t matter if you skip the ad 5 sec in or watch the entirety
@@warframeees8013 It does matter how long a viewer watches a skippable ad for. If a viewer skips it, the uploader doesn't get paid at all, you have to watch it for 30 seconds or longer for the uploader to be paid.
Katharina interesting if thats true
I'm skipping school to learn coding from this guy and i gotta say it's worth it.. this dude is way better than all of my teachers
I am doing this aswell.
@@mikesierra14 *im
Dont ask why
@@ragdoll312
* I'm
* Don't
@@Zainkhan-tk7kt lol
@@Zainkhan-tk7kt
* I am
* Do not
Hello CS Dojo. I don't know if you are going to read this, but I just passed an Exam in Python because of you! Thank you so much! I spend like 10 hours to watch your awesome lectures :)
Masha Allah! Well done brother!
@ツMoon Owner - Owner of the Moon tf is he typing like that for? 😭💀
But his lecture are around 3 hours?
Do you mean total watching and practicing or just watching and rewatching?
@@joeroganpodfantasy42 Sorry for the late answer. Yes, by re-watching and doing everything by myself twice to get it :)
@@AS-nx9fu I deleted that acc 😂. Literally just stumbled upon this. Ig my path has been set in stone
My Professor thinks he's the real shit in Python by creating videos that are 5 hours long just to explain one concept!!!! Now, this is called a real teaching video!!!! short and informative!!!
maybe your prof really delved into that concept during those five hours. Short isn't always good, although in the case of this tutorial it is
Maybe if your professor would release his videos on youtube people would appreciate them more.
I have noticed people tend to dislike what it's offered to them locally or thru a system and they like what they find themselves online.
At least yours tries my professor gives us half examples and then stops teaching 30 mins in. The class is supposed to be 3 hours! Be happy that he actually cares, unlike mine.
I started watching these tutorials yesterday and I figured out by myself how to use these functions to create a program to solve the quadratic formula. I know thats probably nothing for coders but I feel really accomplished and if anyone wants to see the code I can send it to you over email. I just feel really accomplished and I wanna share it with someone. This guy is such a good teacher.
Hi Ammar
Would you be able to send the code to geebee71@hotmail.com please?
Appreciated..Thanks
Pls share me codes
Why don't you just post it in the comments?
Be careful it’s a virus torchan
Post it here bruh
You are being so helpful. Please continue with this series of python
I am 4 years late to this channel and 43 years late to Programming, but I am enjoying every minute of this series. Thanks YK and the entire CS Dojo team.
😂😂😂😂😂😂😂 same here,Things happen at Gods will time. enjoy❤❤❤❤ much love from Ethiopia🇪🇹
You are so helpful. I've grown up in a broke family and I don't have any money to buy course for learning Python. Your videos mean a lot to me. Thank you so much Dojo
I'm so glad people like CS are making these tutorials for free, genuinely. I hope you're in a more financially stable condition now than before.
Def comment1():
print("thanks for teaching me")
print("thanks once again")
Comment1()
Input Error missing Positional input
@@puchu_5001 same
Comment 1() should be comment1() not with the Capital letter
D should be also small letter
def comment1():
print("thanks for teaching me")
print("thanks once again")
print(comment1())
# this is the correct code
Well, out of all of the different, gazillion sites and videos I have paid for and not paid for, you are, in the 61 yr olds opinion, The Best. Knowing what you are doing, and Teaching, are two different skill sets. In my business, just because you have intellect and mental ability, does not mean you will make money. You are doing quite well, starting with a base concept, then giving a practical example, then breaking it down to show how it works. Outstanding job, young man just outstanding. Also, Kudos on your English, bring multilingual myself, it can be a daunting task at times, but you have also done well here. Keep up the good work and I look forward to seeing your future success, by the way, maybe a paid forum might help keep a roof over your head? :)
The Ever Kudoing VIPER
Hey Trade, My dad is 65, and his typing speed is 11wpm, anything below 30 is considered very slow. How do I get my dad to stop acting like such an old man?
@@zumzumwater3018 Viagra gives you wings.
@Trade Viper, I endorse your comments. At 71, I am learning to code thanks to this young man. He is doing an excellent job. Last time I did any coding was back in the 80's, when if you couldn't write a little BASIC, you couldn't get a computer to do anything. @CS Dojo , you deserve success!
dont worry grandpa this video alone can get 15 months of rent
@@zumzumwater3018 he is an old man
Learned more from you in an hour than 2 weeks of a course. Thanks for taking the time and effort. Much appreciated 🙏🏽
I know this is an old vid I'm commenting on, but you earned an instant sub (well, after 3 videos). Informative, understandable, well presented, quick. Great stuff for a beginner like me!
I absolutely love your videos. My father inspired me to learn programming, as in the past I’ve learned some but I’ve gathered a lot of laziness towards programming because of a lot of heavy school work. My father encourages me to just read the documentation and learn Python piece by piece, but I find that boring and hard to follow.
Your videos keep me going and they are professional and clear. Instead of buying courses on Udemy, I just use your courses and they’re amazing. Thank you so much.
The best part:
Running a code without error 😑😑😑
@Loai Alghamdi yes 😁
5 years later and this video is still amazing! You just helped a total noob complete part of the cs50 course with this video. I had no idea how to do mapping with a function. Perfect explanation. Thank you
I was hoping you would go back and add the "is" before "not overweight', it was driving me crazy haha. Great video :)
You are learning Python, too? =))
Tks i already do it
haha same here.. i did it on my end tho.. lol
Wdym, he did change it
These videos are great. I like the way you organize and outline the tutorial at the beginning.
I thought the overview of functions was excellent. Covering what one can use functions for, quickly and concisely, ( be it mappings and returning calculations. ) as well as using of strings. Much appreciate. I've watched a few online Python vidoes and it's nowhere near as sysynced and easy to understand with useful examples as yours. Keep up the good work.
This is the best Python video so far. Your whole playlist is also extremely helpful. I tried to find other beginners python videos but yours is THE BEST, very well explained and elaborated! Great job!
I have been following along with Python Crash Course book in my spare time and anytime I get stuck on a problem or don’t quite understand what I’m doing I always come to your channel.
This video helped me understand functions a lot more.
For those who want to write a quadratic equation, I wrote a code and felt I should share this. So here is the code:
def function2(x):
a=2
b=3
c=4
return a*(x**2)+b*x+c
value_of_my_equation=function2(-2.2)
print(value_of_my_equation)
Note: you can assign any value for x inside the parentheses beside value_of_my_equation=function2 and any values to a,b,c.
Literally the best function video on youtube, thank you!
Your tutorials are helping me understand the basics of python so quick. I really appreciate everything on your page. Thank you!
Hey YK, I from Canada, Québec, Gatineau and I speak french more than english. I am an absolute beginners on python (leaning how to code). I want to let you know that all your Python tutorial are well explained and I love following your courses cause you take your time to explain step by step and I found this a great quality and skills you have. Keep continue what you do, teaching us, sharing your knowledge and more. Your great energy will bring you where ever you want and you will get what ever you need to accomplish your goals. 👍
YK 😁😍 thank u and keep working over it ,u r an awesome teacher 😂
Siddhi Jha hi
an awesome teacher tho
no not awesome... ITS THE BEST teacher
You cannot imagine the amount of joy I felt when I converted km to miles😂😂😂😂
Nah I scream for joy when I nail some code; even if it is basic af.
howw? can you post it here?
@@celineangelina2697
def convert(miles):
print(1.6*miles)
miles = int(input("Enter miles :"))
convert(miles)
@@celineangelina2697 KM to MILES (my way):
def convert(miles):
km = miles / 1.6
print(f"This is the amount in miles {km}")
miles = float(input("Enter KM here: "))
convert(miles)
@@chernobylcoleslaw6698 OMG same I was like YASSS IM NOT DUMB lolol
I think what is insane is that these videos were made in 2018 and I'm sitting here on the same program in 2022 and it still looks the same, still works the same, it's just so easy to use; it's incredible.
I've been self studying using another website where I bought a course on sale, and I have been struggling so much with functions that I even stopped for 2-3 weeks because I just felt so dumb that I couldn't grasp what was being asked of me... this video broke it down so nicely that after so long I'm finally able to grasp what was being said all along. thank you for making this video, it has brought me back to coding!!
miles = int(input())
def convert(miles):
print("KM:")
return miles*1.6
km = convert(miles)
print(km)
Asks to type in miles when run, converts input to KM. Or remove int(input()) and set miles = "amount of miles"
excellent bro😱😱😱😱
miles = int(input())
def convert(miles):
print("KM:", end="")
return miles*1.6
km = convert(miles)
print(km)
(with it stays in the same line :) )
This is the most clear, concise explanation of python I've found, thank you so much for the hard work. :)
Just started learning Python as a hobby. I have no programming experience but I am really enjoying it so far. Thanks, man.
Your teaching method is really good.
Your tutorials are outstanding. You make learning this so much more easier by looking at your videos and trying them on my end. I'm in my second semester of IT security and Networking and this makes it so much more fun to learn and use Python and I am stupid as far as coding goes.
Thank you!
Best functions classes I've ever seen. Congrats!
You mean "Thanks"?
@@geniushalo5473 ahahahahah yeah i think thats what he meant XD
@@RealSpyduh Yeah xd. Its kinda wierd to congratulate someonw
@@geniushalo5473 We Brazilians Congratulate everyone who does that extra mile when teaching. He deserves to be Congratulated. Don't you think?
Teaching is hard. When someone teaches a topic so easy, just thanking him will sound like an understatement to his effort, I guess....
Finally i got this video. I has been waiting from your last video(if else statement )thank you so much yk ..
Thanks for taking the the time to explain syntax in python tutorials. I find your approach to teaching encouraging.
I’m so grateful for finding your channel. Thank you !
Really good series. Thought I'd dip into Python as it's the language used in my nephew's school and he will be taking Computer Science next year. As a retired Science teacher with a lot of experience coding in VB and VBA I've found the presentations very clear and rarely miss a trick (like the importance of the number of leader spaces!). Although I was using PyCharm I now think the Jupyter IDE has the edge for younger students.
Def convert(x):
Return x * 1.6 + " km"
Km = convert(5) #5 miles
Print Km
And you can also ask the user for an input :
def convert(x):
print(x*1.6+"km")
a=int(input("Distance(miles): "))
convert(a)
def convert(m):
return m * 1.6
km = convert(8)
print(km)
I also made this it convert feet to cm
def hight(length):
return length * 30.48
tallinCm = hight(6.4)
print(tallinCm)
I was having trouble grasping these concepts through Codecadamy but you cleared it all up for me. Subscribed. looking forward to checking out your other videos. Thanks.
I have been on app after app and watched tutorial after tutorial, but this is the first video I've seen that explained things clearly and directly using simple terms I could understand. I'm going to be a subscriber of yours forever now! You definitely have a gift for teaching. So many folks in computer science (even if they're brilliant coders) have difficulty explaining their process in a concise way. So thank you; you're a life saver! I'm going to go turn off my adblock now and re-watch this in gratitude :)
so it's dec 2019, i know i'am late, but you saved me. thank you so much!
Thank YK for your useful Python tutorial ✨
A big thank from Vietnam 😄
I am starting to learn coding and this tutorial has helped me a lot , thanks CS Dojo . keep up the good work
Thank you CS Dojo! I have been looking for a channel that I would find someone that speaks clearly and detailed about the subject.
I have been missing a lot.I just subscribed to your channel yesterday. I'm enjoying it.God bless you
Here is the function:
def convert(miles):
km = 1.6 * miles
print("km: ")
print(km)
ok
@akash anil he's not wrong, you just have to call the function cos he didn't assign it to a variable (since he used print and not return.) and he should have said km = 1.6/miles not 1.6*miles.
Should have used return argument instead
it's not a function
@@rahmats.8913 ？
After searching on TH-cam for 30 minutes, This video was the only one that really helped me understand how to use the functions. Thx a lot.
CS Dojo you put things into the plain explanation-something that the other tutorials lack
Hey YK love the videos. I really enjoyed the opportunity for a practice problem at the end. I was wondering if in the future you could possibly have more breaks after writing a string? I have two windows open to go between coding and watching and often have to pause to catch up as I am not as fast a typer as you. Thanks and keep the videos coming!
i am doing the same as well
def functie_km(km):
return 1.6 * km
print("conversis km in mile")
a = functie_km(4)
print(a)
return 0.6*km(correction)
@@pranithsukhavasi2502 it's not 0.6 though
why not just do
def convert(miles):
print("converted km in miles")
return 1.6*miles
convert(4)
I assume conversis is a synonym for convert or converted.
I’m Emmanuel from Ghana and I was thinking about how to start my semester Computer programming. I didn’t know what to do but from the fews videos I have been watching from your site . I very motivated to do this course. Thank you soo much for giving me this foundation 🙏🙏
These are the best videos on how to learn Python. Love these videos bro, thank you.
Love from India bro..I learned PHP year ago ..and at that time I was keen to learn python..but didn't happened.. I did 2 months job as PHP developer in a small company..I left..coz i thought it's not that's I want..but after watching ur another videos and that python series..I think I can do this..thanks for uploading the videos ..and keep uploading bro..thank you so much brother.
Hey man, how many time you took to learn php and to get the job?
i thought you said "love you indian bro" lol
Thanks this is great.
Hello YK! Just wanted to say I hardly had any interests in other videos - eg from Coursera as they were usually not straight to the point. But your videos keep me going n the step by step allows me to imprint the steps into my head! I think this is really important for someone who can’t listens to Long lectures and am really thankful to have found your video 🥺
This was rather complex than i anticipated but actually learnt alot of things. Thx man
The wait is over!
got inspired from your tutorial!! i'm loving python
so are u a programmer now?
it now being 5 years since, I too and invested in the idea of whether or not you may be a programmer now.
This video helped me understand functions for my intro python class! Thank you very much!!!! you explain it better than a textbook does in 400 pages ROFL.
KJ ! My man! The struggle is real in my fintech bootcamp,(atleast for me) your videos help me understand the concepts sooo much better! Thanks for the awesome teaching material.
Its like waiting for the new episode of your favourite anime, only the difference is that you dont know when the new episode is gonna be dropped.
loooool
LMAO! i am currently watching Kenja no maga , Kimitsu no yoba , fairy tale: final season and thats all
You can't compare anime with this
Idk man I've been waiting for Naruto Ep 501 for a while.
@@@kennyg1953 Fam naruto is over, now they have a half assed series named boruto which is basically like naruto filler but its cannon
I did:
def convert(miles):
return 1.609*miles
km=convert(150)
print("km =",km)
km = 241.35
Nice!
06302020
I actually liked it very much! Also the sound of your keyboard is very pleasing>.
I was having a tough time understanding Functions from my other teachers since i'm new to .py. In Less than a Minute you've made it seem like ABC. You are a genius!!
I did:
def km(x):
return (1.6 * x)
Miles = km(20)
print(miles)
32
Yours is also right but you managed it little differently than he asked ..
What he is expecting (in my opinion) is as follows...
def convert(miles):
return miles*1.6
km = convert(100)
print(km)
160.0
Which means 100 miles= 160km
@@khalanesachin Yeah makes more sense that way. Thanks for sharing.
My solution ^^
def convert(mile):
km = mile * 1.60934
return str(mile) + " mile is equal to " + str(km) + " km"
just add the print(convert(x)) statement
@@rafnael8807 what about:
def miles_km_converter(km, miles):
km = 1.6 * miles
print("km ")
print(km)
miles = 5
miles_km_converter(km, miles)
I had to watch this a few times but I think I got it! Thank you!
This is incredible and much easier to understand than my online courses! Thank you thank you!!
It's harder than i thought 😨
Hi dojo and thank you for the great tutorial. When you say
"a function is a collection of structures". What is a structure?
Thank you!
THANK YOU I am taking a machine learning course this fall and I currently am learning python still and you explain so well i am learning so fast
Thank you so much. i am a new learner of python, the return and function are really confusing for me. This video perfectly explained them for me.
Keep up the good work!!!
def convert(miles):
print(1.6*miles)
miles = int(input("Enter miles :"))
convert(miles)
And what if i input 10.7 ? Answer : Not working, Xd
def convert(miles):
return miles*1.6
km = convert(int(input("Enter miles here: ")))
print(str(km) + " km")
I decided to take it one step further with the challenge. Allow a user input to convert miles to km, and convert that integer to a string to show the km after the value!
Thanks so much for these videos! I am absolutely loving learning python3 (my first programming language). And having passionate people recording tutorials like this really helps more than I could ever put into words!
honestly i did the same thing the reason i took a step further was cuz the actual challange was too easy and tried to make a user type the miles and it convertes it to km and i was bout to paste the code in here but guess I was slow. LMAO you got me.
This is great man, im writing my own functions with ease!!! Did the last KM convert problem in less than 1 min. Really awesome, thanks you
How did you do it, it was causing me trouble, but I’m rewatching the video the now
@@rockylizardi-brown1029 keep trying, you must be doing something minor wrong
Just getting started trying to learn programming and these videos have been very helpful!! Thanks
wow i learned more in the first 3 vids than i did taking a four week summer camp python course. thank you so much ! im in eighth grade and this understandable even for beginners.
So love your "Ahhhhh" stuff.
Thank you so much. Your videos are awesome i haven't ever seen such a great tutorial.
Great tutorial I was watching another full python tutorial but kind of don't get it but your explanation helped me a lot
Thank you very much
learning so much here, i am going to get a official course on Pyhton (because i have to do some studies or work from the government here in the Netherlands), so i think that is going to be way easier now.. thanks a lot! as soon as i get a job again i am donating some money to you bro!!
mil = input("Enter miles: ")
miles = float(mil)
def convert(miles):
km = 1.6 * miles
return km
conversion = convert(miles)
print(conversion)
1 mile = 1.6 km
So 1 km = 1 mile/1.6
You can also combine your first two lines to simplify and organize a bit better. Ex:
miles = float(input("Enter miles:"))
That way you don't have an extra variable to keep track of.
@@KrolPower I did it like this lol xD
x = 1.6
def c1 (x, y):
return 1.6*y and print (1.6*y)
@@elantris-2002 lmao
@@KrolPower but it works 😂
Thank you! It is better to watch this than the reading I spent hours on. I just needed to understand what it's like to use arguments. It wasn't clear to me in the beginning of my class!
Your tutorial is amazing clear and detailed, really amazing work.
my solution:
miles = int(input("Enter the amount of miles you'd like to convert :"))
def convert(miles):
return miles * 1.6
km=convert(miles)
print(km)
kms=int(input("enter the amount of kms you'd like to convert :"))
def convet_km(kms):
return kms/1.6
mile=convet_km(kms)
print(mile)
If you convert your input as float instead of int it will be more accurate i think. I tried ur code using the input of 100.99999 an the conversion was a little off... using a float instead of an integer will not ignore decimals and therefore will give you the most accurate result. But ur code helped me out a little so thanks
@@rinovichaz3168 you're welcome and yes float will work better !
@@xodiaki surely your code would work without the miles? why use them??
@@Strawhaty what do u mean lol
I feel like I can remake skyrim
killleeed me xDDDDDD
I FELT LIKE I COULD FIX CYBERPUNK GLITCHES
@@rdenel7126 damn i think even for world's most infamous coders fixing cyberpunk would be difficult
Yes
@@cybernerd7492 sup cyberfucked
@@matmattarayao1277 sup dog😎
I used to not be able to figure out what functions were for. Thanks to you, now I know!
I should have known you a little earlier...You're the best and now I wanna take a course in python, I was here doing it for fun but you've inspired me.
Sir i am big fan u......i have watched your all video....thanx
PRABHAT KUMAR now watch some english tutorials, thank you.
lmao
@@gabrielmoreno3027 as if you are from Oxford 🤣🤣
@@ajithsdevadiga1603 Oxford = English??? XDDD are you kidding me
My miles to kilometer converter:
def convert(miles):
return 1.6 * miles
def temp(x):
return 1 * x
a = convert(4)
x = 4
print(x)
print(a)
print(x, "miles is", a, "km")
Bro I feel like I've browsed through a gazillion videos on Functions and only this video helped me. THANKS A TON😭
If I ever get into engineering and finsihin that faculty bro i wil remember u as my Hero ! I saw others doing tutorials and seeing u Congrats bro u are the one !
print('hello yk')
name = tom
print(name)
print('here and i want to thank you for the videos you create which are much better than how my teachers teach at school'')
Could you please explain RETURN in more detail please.
Return value gets stored and saved into a variable.
def addSum(num, num2):
return num + num2
answer = addSum(500, 100)
# answer = return 500 + 100
# answer = return 600
# variable answer is now equal to the return value 600.
I Didnt understand return very good
If anyone still needs helps, just think of a return as the value of the function. For instance at the end when he writes...
km = convert(miles)
you know the "convert" function will need to return something, can be an integer or a string or anything, because you are storing the returned value of the function to a variable. If you did not have a return in the convert method you would not be able to store it to a variable. Inside this function would be...
return 1.6 * miles
if you didn't put the return there it would still execute the code but you would not be able to say km = convert(mile) since the function would not be returning anything.
Mike Naples thanks
11swallowedinthesea thanks
this is probably the best video explaining functions that i can find on the internet!
Very good video, very well explained, and I was able to do the miles to kilometers converter using just your explanation, thank you very much
I love ur videos , but there is a question how did u know that after the print("ahhhh ahh 2" ) the function1 has ended
What time frame are you referring to? If it's when he was defining function1, the function wasn't called so it's contents weren't printed.
Those 200 dislikes are by people who face difficulty in the process of switching on a computer
You just helped me with something i was stucked for long