CS50x 2024 - Lecture 0 - Scratch 

I am from india and here we have a rigorous entrance exam which consists of physics chemistry and maths and it made me lose my interest in the things I loved about computers and programming now when I couldn't clear the entrance exam twice I am here to revive the interest and get hold of my passion thanks sir David for again making me believe myself will definitely complete this course

this dude is max level in presentation and public speaking

I am so glad to have started this course! And am even more jealous of the students who get to take it live! Thank you Harvard for making this accessible to us :')

Hello, world! I'm starting CS50X today, looking forward to learning with everyone. All the best, hopefully I will see you all at the finish line.

Don't know why someone said this lecture is ugly. It's the true programming 101 for those students with no base. Unlike Harvard, UCL, just tell you what does each term do, and let you start programming, assuming everyone is genius who can programme without understanding the logic behind that.

Finally! Starting again. This time I am finishing the CS50X ingshaAllah

Just completed CS50. It is absolutely worth it. David carries forward the same energy in all the lectures. The course might eventually feel more difficult, but it will be absolutely worth it. Good luck everyone!

Dr. Malan is hands down one of the greatest teachers ever it's not just his knowledge of the field and technical acumen but his ability to convey such knowledge in a way that inspires you while at the same time making it fun and accessible to anyone. Thank you so much for your incredible work Dr.Malan and thank you Harvard for making this gem available to us all.

00:03 CS50, Harvard University's introduction to computer science and programming. 04:56 Computer science offers general problem-solving skills applicable to various fields. 08:54 CS50x 2024 introduces programming to beginners and offers support for all levels of experience. 10:49 CS50 offers hands-on experience in problem-solving. 14:40 Unary counting and the transition to base-2 in computers 16:39 Binary is useful due to the on and off nature of electricity. 19:59 Understanding the base-10 system and its representation of numbers in decimal form. 21:46 Understanding binary representation and its relevance in computing. 25:06 Computers operate on information and instructions represented in 0's and 1's. 26:54 Understanding binary representation of numbers and letters 30:41 ASCII codes map letters to numbers. 32:22 ASCII is used to store information in phones, computers, and devices. 35:23 Spelling the word 'bow' using numbers 37:01 Introduction to character representation 40:35 Different interpretations and representation of emojis by various platforms 42:22 Representing different skin tones and relationships using Unicode 46:00 Colors on screens are represented using RGB values 47:48 0's and 1's store different types of data depending on the context 51:21 Understanding algorithms and code implementation 53:12 Correctness is a key goal in writing code. 56:34 Algorithms' relationship and efficiency in solving problems 58:15 Efficiency and design are crucial in writing well-designed and efficient algorithms. 1:01:56 Handling unexpected situations while programming. 1:03:42 Basic building blocks of programming: functions, conditionals, Boolean expressions, and loops. 1:07:28 Implementing algorithms for a chatbot with conditional statements and input processing. 1:09:33 Developing software to infer responses based on patterns online 1:13:05 Technology enabling self-learning will be remarkable in the coming years 1:14:46 Introduction to the upcoming coding language C 1:18:23 Scratch lives in a Cartesian plane with x and y coordinates. 1:20:09 Creating the first program in Scratch 1:23:53 Fixing the program's prompt and response timing. 1:25:38 Join block in Scratch combines words and phrases 1:29:20 Using Scratch to make a cat meow and wait between meows 1:30:54 Using loops and minimal code for more functionality 1:34:17 Abstracted the idea of meowing and generalized the function 1:36:11 Creating our own functions and abstraction is key. 1:39:24 Using extensions to create interactive programs with logical bugs 1:41:04 Turning tiny programs into games using Scratch. 1:44:39 Introduction to sprites and game mechanics in Scratch. 1:46:06 Implementing the stage and creating sprites in Scratch 1:49:48 Break down programming tasks into smaller steps to achieve larger goals. 1:51:32 Implementing keyboard and wall abstractions 1:54:53 MIT is brought into the mix and its implementation is discussed 1:56:40 Introduction to Scratch and game mechanics 1:59:34 Introduction to CS50x 2024 2:02:18 CS50x has auditions this weekend at Farkas Hall.

49:56 they really rick rolling us

Thank you for all the life changing work you do by providing this to the global community! ❤ Happy New Year from Indonesia. 🎉

Have a great year!🎉

It has been 22 years since I earned my master's degree. I wish I had a professor like this at UCSD & USD. His passion and explanation of the subject matter make CS more interesting and captivating. I'm so jealous! I love watching all these videos for my self-gratification. Thanks for making it accessible to the public!!!

Here's to another fantastic year with CS50 in 2024! The passion and dedication Professor David Malan brings to teaching create an enjoyable and memorable learning experience. CS50 is more than a course; it's an inspiring journey led by an exceptional educator. Thank you, Professor Malan, for your steadfast commitment to fostering a deep understanding of computer science and making it accessible to learners of all backgrounds. Warm greetings from Turkey, where your impact is felt across borders!

I feel really thankful for having this course for free. Thanks a lot. I like your enthousiasm throughout the class.

I’ve begun watching 2023 edition, it’s not just a lecture course it’s like mini series with good and effective video. So jealous all of Harvard student who had learned this course live! even I’m middle age still wanting to learn! Omg Happy new year! ❤

Congratulations to the team behind these "Lectures" videos. I think it's the best way of teaching on RU-vid since it grabs our attention, it's not boring as slides and monotonal narratives. It just keeps us interested and a 2 hours video seems to be so fast. You guys are the best!

It's my first day at CS50 and I am too excited as I have watched this First video and I have to say that David is best Teacher in His Field. He knows how to teach . He is such an amazing Teacher. I am feeling jealous from the students who have attended it Live but not an issue I can watch it online. Thanks to David and Harvard for making this course free.

I’ll be finishing the course this time. Although I have lot of programming knowledge by now. This is a classic 🎉

Thx so much for making this free! The instructor gives an absolutely great performance, entertaining and highly informative! Also I'd never thought to get rickrolled by Harvard :D

happy new year Professor Malan!🙏

Your teaching style send chills down my spine, super engaging. God Bless You.

Just finished this lesson to find out they made an updated version! Decided to give it a second watch and was glad to see the additional resources provided. Thanks everyone for all that you do!

This was such a good lesson. I have 0 experience with CS but am an avid gamer and the part with scratch and breaking down the functions and conditionals really made me look at games in a new light. The theatrics were really solid too. Makes me wish I had taken school seriously.

My year to Get my dream straight. Thank you Mr malan and Cs50 Harvard

That was one of the best and most fun classes i've taken hahahah , the ending was super cool!

It's insane how David is so excited with teaching that he, multiple times, becomes breathless and exhausted for speaking a lot or running between laptop and screen. Gives me great motivation to study!

Thanks to Sir David Malan , Cs50 team and Harvard , i am enjoying very much and learning new things , enjoying with the duck and robo starting out new year with Cs50

great lecture thank you David and all hard workers on this

Starting on 13th March 2024! Hope we can go through this and complete the course!

Happy New Year 2024! Start the year by studying CS50. Thank you our great lecturer!

Hehe... starting today 💯 All the best to me👀🥂

I took this course in 2023 and quickly fell out around lecture 3. But this time in 2024, I'm gonna finish it. I now understand binary and the concepts of functions, Booleans, etc. My original major was Computer Engineering 10 years ago before dropping out. I've learned a bit of Python along the way and now want to take it to the full extent. I've studied a bit of A+, Sec+, and Net+. This was so well developed that I'm just grateful I get to take another stab at it. Thank you so much for being an inspiration in changing lives, CS50. Anyone with enough determination can grasp the concepts, and maybe somewhere along the way, I can find where Computer Science fits into my life. I urge anyone scared of taking this course to reevaluate it in the sense that it may be daunting, but anything is possible with enough passion for learning something new. I can't wait to update once I get the certification.

I'm too excited to complete the 1st lecture, hope to continue the entire journey ❤

This will be my first and. Last cs50 class ❤❤😊i will give full time for this class

Staring this course I have 5 weeks before I start university! I’m a 2nd year in cs and this is really effective to reflect and maybe upskill !!

tideman still haunts my dreams...Best course you will ever take!

"Lecture 0" I see what you did there

I'm starting from CS50 today, excited to complete the course 🤩

I watched cs50 11 years ago now an UI engineer over 10 years, thanks D.J malan

This is so awesome, what would I not give to attend it in person 🎉❤

This is remarkable effort of creating such a great course. I added so much knowledge about programming because of this course. Thanks David J. Malan. Lots of Love from Pakistan

A start of 2024 with CS50 is the best start! Greetings from Italy.

The acapella performance was dope! I love CS50 and Dr. Malan

Starting on 16th march. I'll come here after a while (maybe a year) to remember my beginning ... Thank you harvard💞

Feels like being in the actual lecture room. Entertaining, engaging and it makes me stoked about becoming a computer scientist.

Thanks for everything❤️.

I've never had a "passion" for this but that first part of binary had me confused 😂 had to go back rewatch, take notes. Love his enthusiasm!

I am really grateful for this course thanks harvard

Wow, what a great introduction to not only the first week but to the course itself. Lots of great information and very entertaining as well. If you're planning to only watch parts of the lecture then it would be a mistake. So, be sure to watch from start to finish. You won't regret it.

I officially completed this yesteryear on the 30th. Now that the new year has begun I want to thank Everyone that made this possible! - Jelte

Just finished the lecture 0 and going to watch the other lectures consistently daily.

Such a great course! Excited :D

I started today and see you again after finishing the course 🙏

So excited to be a part of this 😊

Just WOW! What a fun and brilliant course!

Loved every second of this

Thanks for this wonderful lecture

It is simply amazing!

happy new year happy new chapter cs50

thank you for making it free

I have finally watched one full lecture of cs50 and aaa im lovin ittt

The opportunity to learn from such a prestigious institution like Harvard University has been invaluable. I express my sincere gratitude for offering CS50. Your dedication to making quality education accessible has opened doors for many like me to explore the exciting world of computer science.

I LOVE CS50 AND HARVARD, LETS HOLD CS50 ONLINE FOREVER

I discovered the other day that there are full problem sets and everything available on the website, so I'll be following this course properly this time :)

Thank you! you are my lifesaver

Have a great year❤

David is an amazing teacher, i love his enthusiasm

love CS50 and Harvard. I wish I had been there... anyways many thanks for making it free and accessible for everyone around the world

Have a happy new year 🎉 😊

released at a very apt date, good sir!!!!

I started today, here we go 💪🏽

Happy New Year and all the best for 2024 ! Happy Coding 😃

my gosh... if i would have this man as teacher... even so i'm thrilled with this

January 1st drop !?!? CS50 staff ain’t messing around. Have an amazing new year !!

Happy new year!

It took me 10 seconds to make up my mind and decide that I will go to Harvard. Putting so much care into making an intro for a class is incredibly motivating. 1- Apply to Harvard. 2. If accepted 3. Else if not accepted Go back to step 1

What a content... Mind blowing...!!

Thanks for this information ❤ love you harvard i am ready to go with harvard with the help of you tube ❤🎉

Happy New Year 🎉🎉🎉

I'm so excited! Let's gooo! 😄

Very interesting, detailed explanation.

Happy New Years CS50 Students! 🎉

I think that the more comfortable wat to learn this lectures is not to take it like a lecture, but to take it like a good film or serie that we want to watch till the end. Like that we can watch it many times and then have deep comprehension with all his explanation.

Learned about CS50x way too late in 2023, so I decided to just audit and start fresh in 2024. Love the lectures and Prof. Malan energy! This definitely has made me even more excited to learn about computer science.

So a class at Harvard is no less than a theatrical performance! Makes me want to attend it live!!

the entertainment piece at the end is very motivating, I wish every single class ended with something like these :D

Impressive first class!

I am loving this

Im 24 yo aspiring cs teacher, this is ❤❤ even though I know the theory discussed here, but the style of teaching is something I would inspire from

Thank you!

this cool, thank's CS50

Hello, world! This is just so exciting and interesting!

Hello, World! This year, I'm turning 34 years old and just diving into software engineering. I am grateful for the ability to take this course online FOR FREE! I graduated high school in 2008 (barely) however I dropped out of junior college knowing that school was never a strong point for me. I hope that CS50 will help me start fresh with understanding how to become a better problem solver.

Man, what an experience!!!

Every time you guys teach cs50 I am here Again and again Until I start feeling like I am a good teacher

Let’s goo!!!!🔥🔥🔥

Just starting off. Time to enjoy the ride

New year, new goals, here's to the new journey!

this is the best in my life