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

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Question: Add two integer values without using the "+" operator.

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[BackToBackSWE]

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' -> '<<' 11:36 - 13:00
Our Strategy Is Complete 13:00 - 14:09
Walkthrough 14:09 - 16:58
Summary 16:58 - 17:40
Wrap Up 17:40 - 18:05


Note: This only works with positive integers

The code for this problem is in the description with many, many, comments to explain things.

[minhazulislam]

dude, you need to come back and teach us.
the world needs more people like you, blackpenredpen, the organic chemistry teacher, 3blue1brown, nick white, tech with tim, jenny it and many more.

[anniewiley]

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.

[null]

u r a good teacher bro!
Actually i came here because of your comment in leetcode lol :)

[rtothec]

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.

[baichen]

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

[SR-wevl]

Whenever I get stuck on a problem and see if your video is there, I'm relieved! Thank you man!

[CodingForRealLife]

Now I understand a lot of techniques that I wasn't able to understand before by following your channel, keep it up!

[cuteypatootie]

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!

[ShuangyiHu]

You are such a good teacher! Thanks for breaking down the basics and emphasizing the details!

[datle]

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

[donurukirankumarreddy]

The best teaching that I have seen in my life till now is yours .

[musicvoice]

Genuinely explained. Excellent, keep doing your work. You`re a great teacher.

[PheezxCoding]

Your explanations are always so clear and engaging.

[xulinazrx]

You are awesome! Your presentation is so clear and easy to understand!

[vS-xvvm]

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

[supubmy]

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!!!!

[AlexanderFilippov-ua]

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

[thevd]

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!

[hoboshenanigans]

Dude keep it up, i've learned more from you then my attempt at graduate school lol