Stack vs Heap Memory - Simple Explanation

I take a look at Stack and Heap Memory and how it affects your application. Knowing how memory is handled in your application can help you understand your variables' scopes.

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⏳ TIMESTAMPS
00:00 Introduction
00:18 Three main parts
00:28 Stack data structure
00:51 Call stack
01:19 Heap differences
01:50 Variable storage rules
01:58 Value types and reference types
02:23 Local variables
02:40 Reference types on heap
02:57 Value types on heap
03:20 Garbage collector
03:53 Exceptions to the rule
04:40 Asynchronous methods

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[michaeltheisen]

These ideas were saved in my head as a sequence of words for the entirety of my undergrad. If 5 short minutes you managed to actually help me understand a huge gap in my understanding. Thank you so much.

[christymathew]

YOU ARE LITERALLY CAPABLE OF REPLACING 99 PERCENT OF TEACHERS WHO PATHETICALLY FAILED TO TEACH ME THIS CONCEPT. THE CLARITY WITH WHICH YOU JUST EXPLAINED IT SHOWS THE TRUE MASTERCLASS YOU ARE IN. I WISH I DINT WASTE MONEY IN COLLEGE WHEN PEOPLE LIKE YOU EXIST. LOVE YOU SIR ❤

[b]

I've seen multiple videos of you now... you can explain the essence of things very well. It's a talent. Very good. Thank you!

[kohltonpeterson]

This is one of the best programming related videos I have ever watched. It cleared up so much of my confusion in C++.

[luminuslux]

Not gonna lie, i cant state enough how explanations like this can massively improve your understanding of why code works the way it does. Just learning to code is one thing, but understanding whats behind all of it and WHY whatever thing actually is happening, can definitly up your game. Im not a pro by any means, but i think stuff like this is very important.
The visual presentation also makes it way easier to follow and connect the concepts - so thx for that 😊

[JakeeReacher]

Alex, you made my day. I would call you one of the best instructors! Your explanations are flawless. You explain perfectly in context. For instance, where you explain why variables are not accessible outside the method.

[awys]

I've been coding, and teaching code for the past 4 years. This video blew me away. Explained everything so well, and was incredibly easy to follow. Sorry, Alex, I will be stealing this! Amazing work, and you've got a new fan! Thank you!

[scubagoblin]

Reading a book right now that explains this concept rather poorly over 20 pages. You managed to grant me understanding in 5 minutes, and now I can continue reading past the chapter. Thank you, great explanation!

[RYANCARNEY-dcqe]

This video actually answered all my questions about how the stack and heap work together. Great explanation!

[Nicolas-L-F]

Insanely useful video, didn't think i'd learn that much in just under 6 minutes, thank you.

[patrickmccarthy]

The analogy of a stack of books provided much needed clarity for me. I appreciate the video mate!

[fuadadio]

Your videos are awesome and very clear.
Can't wait for a full CS playlist. Thanks for what you do for the community Alex.

[brunofilgueiras]

such a clear explanation couldn't get better thanks Alex

[Tanessok]

Thank you sir. Good Explanation.
Please, I wish you make a video on "Why in Java, Do Local Variables Used in Lambdas Have to Be Final or Effectively Final?" and please make the explanations at the memory level too, so we can understand all the mechanics behind it.

[bitwisedevs]

Finally a much simpler with actual sample code that explain the whole stack and heap stuff. Now I understand why and when OOM occurs in app, the usual suggestion is to increase heap size but said to be slow or when we do recursion recklessly we get stackoverflow.

[bsy]

My jaw dropped when you explained what happens to variables declared in the stack, I never made the connection between this fact and the scope of variables, thank you soooo much !!!

[benessilfie]

This explanation was exactly what I needed! thank you Alex

[austinhummel]

I can't put into words how helpful this video was. Thank you Alex!

[AhmedAlsabsab]

Finally I understand the difference in few words and short time... keep doing videos like this

[alexsal]

This is an excellent video about how the memory works, I love the last part about asynchronous methods. Thank you for this awesome content. I wish you could speak more about asynchronous functions. 😃