Add Two Numbers Without The "+" Sign (Bit Shifting Basics) 

Table of Contents The Problem Introduction 0:00 - 0:51 A Way To Think About Number Bases 0:51 - 3:56 Back To The Problem At Hand 3:56 - 4:16 Let's Add Some Numbers (Decimal, Base 10) 4:16 - 4:59 Let's Add Some Numbers (Binary, Base 2) 4:59 - 7:40 Bit Shifting Operators: The 'AND' -> '&' 7:40 - 9:41 Bit Shifting Operators: The 'XOR' -> '^' 9:41 - 11:36 Bit Shifting Operators: The 'Left Shift' -> '

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Hey man I just wanted to say I think these videos are immensely helpful. The way you explain your thought process on these complex but tiny subjects rashly helps a person change the way they think about code, not to mention learning the lingo of a SWE. Also please don't ever lose the awkward endings and outtakes.

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your explanation really helps people who were totally lost, like me.

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I took compsci and learned this but could never explain to my friend who couldn’t grasp it. She struggled the whole time. This is such a great explanation and you are an excellent teacher.

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I have spent literal years glossing over bitshifting because no explanation could come close to me understanding it. I now have at least a basic knowledge and a starting place. Thank you!

This is the best explanation I've ever seen! Thanks a lot!!!

Explanation is so good that we won't need to write code for this in interview - just a dry-run with example would do.

Faced this problem in an interview with Qualcomm ... I wish I could see this video earlier to come up with bit manipulation solution :( Thanks a lot for clear explaination!

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Loved the way you explained even the basics. Thank you.

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This is the ultimate guide to this hell of bits manipulation. Thank you so much.

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You are extremely talented at teaching this stuff, I have struggled with bitwise operations for a while now, however after watching your explanation I was able to implement this myself, which is a major break through. Thank you for this video!

I am always impressed with your videos. How do you choose the questions? It seems like you have a set of question that you plan to cover and I can feel that those questions are more relevant to actual skills that we need for interviews (not like brain teasers). Also, what's your plan after to cover all planned questions?

Oh wow! Cool, this was a nice refresher. Great video

My Brother, since college back in 1999, I haven't had to use it. But, you have refreshed my way of thinking. Thanks and continue to progress forward!!!!

very well explained solution! i think it’s worth noting that this only really works with positive integers

Ive learnt alot today. Ive been struggling these days and i was almost burn out because of the amount of unfinished projects i had. Thank you

Bro...u r a genius.... thanks for making me prepared.

Man, that's been interesting and fun to listen to you! Thanks! I got topic)

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Thanks for your vids. I found some inconsistencies with your explanation. At 11:48 you say that when we do shift, '1 gets shifted out'. However, it doesn't. As an example, take 0101 (5) and 1101(13) When shifting, we add 0 on the right side and if carry started with 1, it will grow as well. We can't loose the first 1 because just like other 1s in the carry, it specify an index where we need to carry over. In the provided github code, line 134, it says "1 got shifted out". Again, if we shift it, we will loose part of our answer. The reason why, at some point, 'carry' becomes 0 and we brake out of the loop, because on 3rd iteration after increasing the carry by one more digit, we will be performing '&' operation between 4 digit (0010) and 5 digit (10000). The result of it will be 00000. Result of the '^' operation will be 10010 (which, again, won't be possible if we lost that left most '1'. 'carry

Thank you very much. Finally, I got the concept!

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Great video. Speaking the entire process through like the computer solidified it for me.

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Best explanation I've seen. It helped me implement my C# program! Could you do a similar video for substraction without using arithmetic operators?

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Amazing explanation, much thanks !

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You did such a great job at explaining this tedious problem. Please make a video on Dynamic programming concepts as well. :-)

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A short video like this about Two's complement would be great.

Thank you! Helped me alot

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Very helpful but the code examples are missing from the description, were they removed?

Thanks man!

Using that ad to cover the redundant statement was brilliant lmao. I would've never noticed it was repeated if you didn't point it out honestly.

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That's a pretty intuitive explanation here!

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Thanks for explaining this so clearly

Thank you so much for the clear explanation. Could you please upload video on Division as well

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wow...it did take me a lot of rewinding to understand, but thanks to God I finally could get the whole picture of how it works.

Never thought about this logic 😯😯.... Amazing 😍😍

brilliant explanation~!

OMG came from Geeksforgeeks. Thank you so much sir.

Hey, thanks for the video! You're the best. Can you make more videos on bit manipulation please?

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Thank you so much, this solve my wondering for years as not an engineer

I start so well, then I just get lost. I have to find a way to get this concepts in my head permanently.

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Thank you!

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