You helped a lot of students achieving their goals. You deserve huge respect. Indeed.

Why can't we get teachers like this in college lol. I'm sure you're tired of hearing but thank you so much for all your videos, you explain everything so well.

give this man an oscar!

sir i want to hug you.i watched this video and now i am certain that i will perform better in my exam

@Maha- You can check the description for link to source code. Pasting it here too: gist.github.com/mycodeschool/7702441

dude this is the best video i've ever watched, i totally understood everything, you are really good at teaching.

alright, please add one more thank you to your list. And sir i can't express what kind of respect you owe in every students heart.

You are awesome sir, You taught me the whole postfix and prefix concept in just 14 minutes including algorithm. Thank you sir

This is so well done. Thank you so much for creating these videos.

You saved me again, I have exam coming up where I have to evaluate these.

Thank you! an awesomely detailed explanation, and the visualization was very informative too!

This was very helpful. You have my thanks, good sir.

You are an amazing teacher. Keep up the amazing work!

Sir your teaching speed is as perfect as it can be.

Even after 7 years he has the short and best video on this topic

You gave strength to my self taught programming journey

thank you sir for such a wonderful ds experience i am seriously obliged thanks

awesome ! so clear and understanding, thank you so much! the book for computer architecture just makes no sense. your videos are getting me through this class !

Your videos help a lot in building the logic !! Thanks a lot!!

OMG thank you so much! you explained it much better than my college teacher! Thanks for sharing this valuable information with us for free! thanks a lot!

great video, very clear description of pre and post fix. found it very useful

This is a very crystal clear explanation. Thank you for the video sir.

sweet and simple...u make concepts looks so simple..Thanks a lot :)

Hi, Your explanation skills are way greater than any of the youtuber with data-structure videos. I recommend your channel to each of my colleagues whose base seem unclear in data-structures. You have did a great job. I have one query in this lesson. How can we convert an infix expression to pre/postfix expression, which contains an unary operator in it? Please edit your video with this content or please make a separate video for this. Thanks in advance.

What a voice you got!!What an exaplanation skillsyou got!! Loved it

Sir, you are the best. If you thought in a University, I would totally go there.

thank sir.. this is best video for post-fix which i met

Beautiful tutorial. Very good English. You saved me so much time.

Saved my semester. Thanks

fab u all did a fab job awesome explanations this has become one of my fav site and videos thanks and keep it up u guys

Thanks! you helped me get my homework done. :)

truly a godly video my dude

Really thanks a lot sir

Very illustrative. Thank you!

Big thanks sir. Very helpful for my exam 😍

too OP man... You are the best teacher on the planet

Best version of explanation

Thank you very much it was very helpful .

I heard he is no more, but he left such good videos, he lives with us as long as these videos help people like us.

very well explained, thank you very much!

thanks a lot for so much easy method .....GOD bless you man

awesome. Very clear explanation sir.Understood it totally

Amazing, thank you so much, for this kind of video. God bless you sir.

thank you so much kumar.

Really excellent explanation. Thank you very much..

Good job!! Great explanation. thanks :)

this was very helpful, thanks a lot

best video on the internet

Great explanation!

GREAT WORK BRO!!

Awesome explanation ❤️. Thank you sir 🤩🤩✨.

You guys are awesome!

thanks so much for this explanation

You are a good teacher

Thanks.. Helped me a lot!!

You were a genius,no wonder!

thank u for this amazing video. u r doing a great job!!

Awesome Explanation .. Thanks a Lot :)

You are absolutely genius

Nice Explanation, Thanks a lot

Great explanation as always

just awesome explanation ....Tnx

Great Explanation👍🏻👍🏻👍🏻👍🏻

super clear thank you!

why at the subtraction you place 26 as operand 1 instead of 9? isn't supposed to pop the topmost elements of the stack? 9 is the topmost and must pop out first then 26 so you will have 9-26, I'm confused.

Thank you so much for your video

What code should i write to evaluate the expression from right ?

amazing..thanku sooo muchh... understood like never before

great explanation...

thanks, very helpful

Good explanation sir... Thank you so muchhh

Great teacher 😍😍

best explanation...

Well done!

if statement is that ( a=b=x=y=0) so what we do in postfix and prefix?

what if i want to write an expression without spaces or comas? 2+3*4-5? i get a error, i dont know why

Sir can you please tell how to convert complex expressions into postfix, for ex :- in my book a question is given i.e A*(B+D)/E-F-(G+H/K) and (A+ B ^ D)/(E-F)+G (^ IS NOT POWER). Please help!!

GREAT VIDEO !!

in the pseudo code, why do we subtract a '0' from expression[i] while trying to get the value of the numerical digits? line 64.

lecture is awesome

There is no words to say Mind blowing explanation

Best explanation🤗🤗🤗🤗😘

you are a legend!

It is really good.

In evaluation of prefix exp, atlast... If d operator comes, u hav two pop two elements...n here 2nd element is the 2nd operand.. So d final ans should be like -17 right???

OMG,,, ****** Tqs broo 👏👌👌👌 👌👌

Great sir!!

Nicely done

10:48 shouldn't it be 9 - 26 which would be -17? I don't understand which operand is the leader when it comes to subtraction.

for the prefix example, could you not write it as: - 9 + * 5 4 * 2 3 this gives me the same final answer of 17

thank you very much ..

thank you so much.

awesome sir..

what if value of operand matches with ASCII value of operator or its value crosses 255.can anyone explain..

thank you very much

thank you so much

It will be really good if you can explain Time and space complexity too with your videos.

great! thank you

I understand now thanks :)

Awesome 🔥🌟🌟🌟🌟🌟