For Loops & While Loops in Python - Beginner Python Tutorial #5 (with Exercises)
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- Опубликовано: 13 мар 2018
- Fifth video in my python tutorial series. In this video we cover the two different types of loops, for & while loops. Loops allow you to repeatedly execute blocks of code. For loops work great for a set number of iterations as well as iterating through lists. While loops work well with booleans (true or false).
If you have any questions, leave a comment down below!
Feel free to watch on 1.25x or 1.5x speed.
SUBSCRIBE if you enjoyed this video!! More tutorials to be uploaded real soon.
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PYTHON TUTORIAL SERIES:
Setup & Installation: • Why Should you Learn P...
1. Math & Variables: • Math & Variables in Py...
2. Conditional Statements (if, elif, else): • Conditional Statements...
3. Functions: • Functions in Python - ...
4. Lists & Tuples: • Lists & Tuples in Pyth...
5. For Loops & While Loops: • For Loops & While Loop...
Learn to Program a game (mentioned at the start of this video): • How to Program a Game!...
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Video Outline!
1:09 - Intro to For Loops
2:09 - Getting Iteration Number
4:10 - For Loops + Lists
5:31 - Calculating the average value in a list
10:21 - For Loops + Lists (index method)
12:33 - Using the Enumerate function
13:27 - Intro to While Loops
15:02 - Counting to 10 with While loop
18:18 - Break & Continue Statements
21:17 - Coding Bat Example Problems
24:53 - Coding Bat Example #2
30:33 - Video Recap
Feel free to watch on 1.25x or 1.5x speed to learn faster!
Keith, can you post your font_face for sublime text?
man, honestly you are the coolest programmer. I will start enjoy watching your python and NN videos systematically.
where were you 4 months ago when I statrted teaching myself python.. you are the man bro.. thanks
I used to program in C/C++ using the Windows APi (Petzold book) and it was a complicated process!! Python is so much easier!! Thank you for these tutorials!!
Hey, Keith. Great video as always! Could you make another one regarding the nested for loops (for loops in for loops) and nested if statements (if statement in if statement)? Stay safe!
Keith your videos a very easy to understand, So helpful Thanks..
Thanks. I always learn something new watching your videos.
Very helpful, thanks a lot!
Man! you are simply awesome
u r da man, bruv
you just helped me after being stuck for 2 hrs on this while loop.
Love your tutorials, easy to follow and good content for beginners. Short question on the Codebat "String_time": did you use the loop intentionally as one could have solved it by simply stating: return str*n
Thanks again for your videos!
Thanks for the kind comments! Yea so I used the loop intentionally just to demonstrate an example of what this video was about. Your solution to return str*n would be more optimal in general.
Thanks for your quick response! Ok, understood .. makes sense. Btw: would you have some recommendations with regard to next steps once finished with your tutorials? Codingbat or any other resources for becoming more advanced? Thanks!
Well I guess it really depends on what your programming goals are. What type of stuff do you think is cool? Some potential areas could be game development, robotics, machine learning, app development, etc. Let me know and I'll try to point you to some good resources
It's my first time here but i liked you the first minute the video started and the second you started talking. I don't think I am going anywhere.
thanks to you i know python
For the 24:31 Exercise, I want to ask that why my code doesn't work? What's the difference?
def string_times(str, n):
for i in range(n):
return str*n
Can someone tell me why do we put a zero number when getting a total value for smth (7:19) .. maybe the question is absurd but I am a beginner. Thank you in advance!
Because you can't add to a variable that doesn't exist yet. It also needs to be a number for adding to make any sense. You couldn't add 1 to a function object so Python needs to know it's a number first.
For an absolute, absolute beginner, how do we arrange numbers in ascending or descending order/ Thank you
Watch his other Python tutorials it's explained in number 4 I think
Hi man where i can practice more exercises?
You can also do this:
def string_times(str, n):
return (str * n)
Right, but that wouldn't be a loop
THank you :)
24:41 For whatever reason this works too...
def array123(nums):
if 1 and 2 and 3 in nums:
return True
else:
return False
lol its so good but only for this situation
But this code will always return True even if the sequence '1, 2, 3' is not in order. For example, print(array123([1, 1, 3, 2, 1])) will still return True as it contains 1, 2 and 3 but not in that order.
i = 2
n = 1
while n
from time import sleep
i = 2
while True:
print(i)
i *= i
sleep(1)
Nice
What is "i". Can it be something else instead of "i" when you type "for 'i' in range (10):" ?
Yes. You ‘I’can be almost anything.
Yes i can be anything it may be a variable name. This i or any variable is usually acts like a counter of for loop
takk fyrir !!
Hey man thx preparing for exam 😅
Hope the exam went well!
def string_times(str,n):
non = int(n)
return str*non
Hello. First i want to say that i really appriciate your work. Im a 13 yrs old kid and im learing python rn cuz i want to work like software engineer. I can write a simple codes but when i try to solve problems in this site i cannot. I really cannot understand the strings.
Hmm I'm not sure I understand your problem. Can you try to be a little bit more specific?
@@KeithGalli when i have an idea to do some sinple code i do it. But if i have it like an exercise like in this site i cannot figure it out. Also im watching your tutorial to do a game and i understand the code but i cannot write it by myself. Btw thank you so much for answering me ur the best❤️
Check out this video for additional guidance on solving the coding bat problems. They are not easy at first, but with enough practice you should be able to start getting them! ruclips.net/video/lx7oqZ7Nl3k/видео.html
5:41
keith your videos are awesome ~ can you make on django app on web with python ! step by step .. how to!
so for some reason, it says this is invalid
game_over = False
score = 0
while not game over:
print("playing game")
can any of you guys tell me whats wrong
@@rtmbiking67 Well you used the wrong variable in your while loop. It should be game_over rather than game over!!😊
Ok thanks
Index of 25 positions with weights varying from about 180 to about 250, and you have what looks like an MIT flag on your wall. I would guess the Bruins.
You are correct! I'm a big bruins fan :)
@@KeithGalli Well as a Hawks fan, I'm just happy it wasn't Detroit. Cus then I'd have a dilemma on my hands lmao. I spent 4 years living in Boston, so I can get down with Bruins fans. Thanks for all the videos and all the work that you do here man. It's awesome.
hey just never say standard deeev. Other than that it was a great review thanks big fudge
CodingBat.com: good path as a learning aid: thanks Keith;
i have big problem guys that i cant understand the task any body can help me and tell me anything that make me better in that
✔
weights = Red Sox lineup?
That was my thought! MIT in the background and 25 players.
side effects of using visual studio code saving all the time it happens with me too bro lollz
Red Sox
You were very close, but actually took the numbers from the Bruins!
how can one improve python skills after watching your videos
bruins!
god bless u xdd
which team was it lol
i write a code weights = [1, 2, 5, 7, 9, 8]
total_weights = 0
for weight in weights:
total_weights += weight
print(total_weights)
and get:
1
3
8
15
24
32
why not sum ?
Move: print (total_weights) out of the loop. Should be vertically aligned to: for weight in weights: .