2. Branching and Iteration 

To whoever made the subtitles for this 40+ minutes video. Thank you.

pre labeling ​0:02:08​ Strings 0:03:48 (Coding) 0:06:31 Input/Output:print 0:08:21 (Coding) 0:09:57 Input/Output:(" ") ​0:12:14 (Coding) ​0:14:00​ Comparison operators on int , float , string 0:17:06 MIT map 0:18:00 0:19:58 Control flow - branching 0:20:00 0:22:00 0:24:51 ​Indentation 0:25:46 =vs== 0:28:00​ 0:28:58 Control flow : while loops 0:31:57 Control flow : while and for loops 0:35:09 ​Control flow : loops 0:36:44 range (start , stop , step)​ 0:38:00​ 0:39:42 (Coding) 0:41:06 break Statement 0:42:26 for vs while loops

Love MIT for their CS OCW!!! One comment to add here. When you ask Python to compare two strings (like mentioned in the video "a" > "b" and the result is False) in the backend, Python is comparing their ASCII values (ASCII value of "a" = 97 and ASCII value of "b" = 98. Hence False)

THANK YOU, MIT COURSEWARE and sponsors! ❤️

Me and a fellow colleague are leaping into Python (my native language being R). The lecture videos are well-paced and the lecturing style is top notch! I lecture the occasional statistical programming course, and it's not always easy to keep it interesting and engaging like it is here.

You're a good teacher, accessible yet giving your students a chance to learn.

Dr.Bell, can't thank you enough for the great explanation.

I am very lucky and happy to see the smiley ,energetic and enthusiastic face of ANA mam ,when she tried to listen the question that the student asks.BUT AT OTHER PLACES , THIS HAPPENS RARELY BUT NOT IN MIT.

Kind of wish I got to experience CS at MIT. I loved my professors but this is a professor I know I'd like and learn alot from. Plus MIT's reputation is unmatched.

Really good for a start with Python. Great work Dr. Bell (and Professor Grimson).

Dr. Ana Bell is great teacher.❤❤❤ You are very good at explaining and in all perspective. You are best.Thanks MIT for Dr. Ana Bell. Thanks MIT for OCW.MIT is best and doing great work.

For those curious about how Dr. Bell commented out certain lines of code here's the shortcut list, Single line comment Ctrl + 1 Multi-line comment select the lines to be commented Ctrl + 4 Unblock Multi-line comment Ctrl + 5 P.S: Got this from Stack Overflow so due credit to the actual authors for this query.

Wonderful lectures by Prof. Ana Bell. Thank you MIT OCW.

Really liked the Zelda example, loved the flipping table :) Well played, Dr. Bell!

you're brilliant Dr. Bell. love your lectures💜

Thank you open courseware for providing such high quality leacture and materials..hope you have a great day😊

Had somebody taught flow control statements as clearly as Dr.Bell my coding journey would have been at stratospheric levels...these lecture ignited my hopes of becoming a good programmer...

thank you Dr Ana Bell this was a really helpful and fun course !

She is so adorable， I really love her lessons. Thanks MIT.

OMG, these are finally in HD!

Superb video of excellent teaching. I wish she was my professor when I was an undergrad.

VERY VERY thanks ,MIT open coursewarde.

What a smooth lecture ! Thank you ! You helped me understand Python. My professor did a terrible job teaching this. Thanks MIT !

thank you Dr Bell ! , rock on! better explained than my school lessons 4sure

I really love this lectures and completed my some basic python syntax and basic algorithm related concepts thanks for this contribution.

the best lecture on python, the reason why mit is a top college in the world

Excellent lecture. Makes me wish I were back as a student. this is the best explanation of for & while loops I have seen. I wish I could take this course, but I no longer live in Boston.

This is the best MIT has to offer. Good thing its free.

Dr Bell, you are the best❤❤

you can actually use a for-loop to get input in Python - create a simple iterator class where __next__ returns a value from a call to input().

best python tutorial ever

Thanking MIT OCW Please upload more 💙

AMAZING LECTURE

Thanks a lot Dr. Anna Bell

Dr Bell Your class was comfortable and interesting. Thank you for not writing on the board.

if course_grade == A: print("this teacher is amazing") elif course_grade in range (A, C+): print("This teacher is really good!") else: if course_grade

nice lectures delivery....dr bell

mam, i really loved the way you teach.

Adorable teacher. Excellent lecture.

I love your problem sets. They really made me want to hit my head with a piece of wood over and over again. Real learning guys.

This woman is so adorably awkward, nervous and brilliant.

very helpful, thank you

This is awesome!!!

So do we need spyder? because I'm using 3.6 and some of this doesn't seem to translate.

شكرا اوي

thank you ,mit

take = "Thank you" name = "Dr. Ana Bell" print (take + ", " + name)

Ana Bell ❤❤

I want to ask a question not related to syllabus but a great tips Dr. Ana Bell used in this lecture, Lecture No 2(Branching and Iteration) and I have question in Time:39.48/43.30.... Here Dr. Ana used a great tips: She just select some sort of lines and deleted the "#" sign in a single moment.... I want to know how can I do it the same thing on Spyder.... Please comment to me... If you know please give me suggestion... Please Please.... (From INDIA)

She is second(I'm confused) best professor i ever got on MIT

Amazing clasess

thank you !

Присоединяюсь. к отзыву "walawave ", за субтитры. Thank you very much

SHE IS SUCH A GOOD TEACHER

The idea behind ocw is profound. By distributing knowledge to the whole world for free, MIT is paying tribute to the geniuses like faraday, curie, ramanujan etc... Who produced phenomenal works despite of not having the proper access to the knowledge they needed.

her legend of zelda example was a really excellent example to use and keep students engaged

Dr Bell is a legend

谢谢

thank you mit

i have a question, how do you remove the first hashtags in a column with a shortcut?

OBLI WATCHED THIS FROM SRI LANKA.TO BE HONEST NONE OF UNIVERSITIES OF SRI LANKA PROVIDE GOOD LECTURES LIKE THESE

Very nice information

Transition from if-else to while loop tells how much i took the loops for granted .

what was the version of python in these courses?

Using which programming language can make CAD software?

Why isn't "Type a number..." included in the output, as it is included within the quotation marks?

to improve examples e.g. for string print( "you_can", "show", "where_the_spaces_are_added", "!" * 3 ) the example code blocks could have a colored background or have a colored border

I love this teacher!! She's so funny, but in the driest way possible!! It's great! 😅

Could someone please explain what's the difference between the "+=" and "=+" operators?

the number you mention in parenthesis in for loop doesn't printed on the screen

Brilliant

I want to learn a lessong everyday if she is my teacher. I will never get tired or bored

It would help that when Ana points to the board and makes a comment, the camera also shows the board and not the picture of Ana talking. thanks for the free lectures

Whene I've tried , the input part of the lecture ,,, The following message just showed up ( get ipython ().kernel.shell.run_line_magic('clear', ") Can anyone please help me !!!!! Otherwise, the lectures are perfect and Very well explained.

thanks MIT

on the 40th minute why i has the values 5 7 9 not 5 6 7 8 9 ????? please explain !!!

I can't get enough my brain is finally feeling euphoric

Whenever she shows the python codes on her PC's spyder, how she change from comment to code(vice versa) so quickly by dragging? is there any short cut for that functionality?

I am not getting that one at 12:26 I am doing this in Google colab, Is that the problem

Who knew Darlene would be such a good professor

can somebody please tell from where to get Spyder python that Dr.Ana Bella Used

9:40 get input from user...every thing id a string, evento the numbers

19:40 three ways to make decitions

5:00 the estar operator with strings

for the maze game, " n=input("you are in a deep forest. **************** **************** Go left or right?")"under the while loop doesn't need any print command and it just repeats itself?

Anaconda allows intereacitivty: IPython + Spyder (inspire on Matlab, (Matplotlib),+ support for other languages like ruby, R, Julia, Haskell ....etc. wow I am going to explore that tomorrow...

Regarding range(stop,start,step) 40:30: Normally num-1, but in this case, we're going to the end minus "two". (num - 2). I came across a component of this topic on stackoverflow, where someone described the end of the range as "minus two", which left me puzzled, so I thought I'd post.

"b" is greater than "a" because __lt__ / __gt__ methods of the string class were made to convert the characters to ascii values and return the comparison of those values?

28:10 While loop insted of if statement

did any one made expanding for the code of the game that puts sad face and many tables after entering right more than two times?

38:54 both codes ARE WORNG SHOULD BE for i in range(5, 11, 2 ): print(i) NOT LIKE : x = 0 for i in range(5, 11, 2 ): x += i print(x) I get output : 21 with that code for some reasons

32:21.... y no n += 1?? also loving the Corse so far, did problem sets 0 and 1a before watching this, would love to go to MIT at some point in my life to get a Comp sci degree

How can I get the files and slides that she asks the class to download

Thanks

do we have to use spyder ?

How can i delete # on each line for one time?

how do you remove the # from multiple lines in spyder? whats the hotkey. theres probably also a hotkey to a add it. so comment/ uncomment selected lines. like at 39:48

Can someone tell me how she deleted and adds character to each line at once. Can it be done on windows?

When comparing string how will it compare a and 1

Hi people, anybody could give me a hand ? I'm trying to do the fingers exercises in the textbook for this course, and in chapter 3 there is one that says: 'Write a program that takes an integer enter by the user and prints two integers, root and pwr, such that 0 < pwr < 6 and root**pwr equals the integer entered by the user. If no such pair of integers exists, print a message saying so.' I'm really strugglin with the logic there and would gladly accept some help. Thank you