Python Tutorial - Reverse a String Using for loop

[@papie5151]

I love all your tutorials. I see often in the comments some smart code which for a beginner like myself means nothing- maybe,will be valuable in the future, but your tutorials are in depth which drives in my understanding of the programming concepts. Please keep doing what you are doing. Bless you.

[@AmulsAcademy]

Thank you so much :}

[@uday2339]

n =("amuls") n1=(n[::-1]) print(n1)

[@hemantprasad1018]

there are 5 ways to reverse a string in Python

[@marioshusband3700]

what does the (n[::-1]) mean? I barely learned python.

[@40melcolmvaz55]

​@@marioshusband3700 go check slicing of index of a string tutorial.

[@Goshbello-Money-AI-Tutorials]

Thank you again for another well explained tutorial. It’s not just the method you used to solve the problem but I have gained a better understanding with FOR LOOP watching this video. You’re a great teacher. I am waiting for your next video. Thank you

[@AmulsAcademy]

Thank you so much :)

[@suyash7450]

I have'nt seen anyone explaining concepts so deeply as you do , It makes learning very easy thanks mam for your efforts

[@a42h]

Thank you this was very helpful! I like how you went into details of the for loop and explained the logic of it.

[@AmulsAcademy]

Thank you:)

[@FI3RZE_PATRIOT]

@@AmulsAcademy GREAT VIDEO AND WELL EXPLAINED!!!

[@vidithnarayana2346]

@@AmulsAcademy python code to reverse a string without effecting special characters?(Input: ab,c,d)(output:dc,b,a) please reply

[@romantrenton3644]

You all probably dont give a damn but does any of you know of a method to get back into an Instagram account? I somehow lost my account password. I appreciate any tricks you can offer me.

[@hunterjamal6970]

@Roman Trenton Instablaster =)

[@kapishsingh]

def reverse(y): for i in range (1,1+len(y)): print(y[-i],end='') reverse("amulse")

[@00xess]

why the hell did you pass in 1 at the first place, just use range(len(y)) lmao

[@panagiotisgoulas8539]

@@00xess If he did that he would have to print(y[-i - 1], end=''). First index is 0 but last is -1

[@thesumitkumar0]

#run_this print(input()[-1::-1])

[@kapishsingh]

@@thesumitkumar0 you can ignore -1 in beginning

[@SB-fs4vi]

You are really a very good teacher with clear concept. All your videos are helping me a lot as a beginner. Thank you so much🙏🏻

[@AmulsAcademy]

Glad to hear that :)

[@ramchandrakulkarni5917]

Great Explaination, I was stucked at working of the for loop. But now it is clear. Thank You.

[@gamingengineer360]

now thats what I call explanation. a k.g. boy can understand the program. thanq mam.

[@AmulsAcademy]

Thank you :)

[@lokakshaiathibans484]

Nice and clear explanation. How to print this sequence: Input : A B C D Output : Z Y X W

[@AmulsAcademy]

Try this: n = input("Enter number of elements : ") k=65 list1 = n.split() for i in range(len(list1)): c = ord(list1[i])-k h = 25-c+k print(chr(h))

[@davidusharauli2227]

How this code reverses the input string? It works but I am not sure if I understood the mechanics of it. Can you explain a little bit more.

[@AmulsAcademy]

def reverse(string): reversed_string = "" for i in string: reversed_string = i + reversed_string print("reversed string is:",reversed_string) string = input("enter the string:") print("entered string is:",string) reverse(string) Here first , string = input("enter the string") will be executed, so you need to enter the input, if you enter "amuls" this string will be stored in variable string Next it will execute , print("entered string is:",string) so it will print entered string to the output screen. Next it will execute function call that is, reverse (string) so now control goes to the reverse function definition, so it will execute that function. def reverse(string) here string is the input that is "amuls", next we will take one variable and we assign empty string to that. reversed_string = "" here reversed_string is a variable which will hold final output. next for loop, for i in string: reversed_string = i + reversed_string so here string is "amuls", so initially variable i value will be 'a', so it will execute for loop body , reversed_string = i + reversed_string here we are doing string concatenation, symbol + is used for concatenation of strings. reversed_string is initially empty string and i value is 'a' so it will concatenate 'a'and empty string, so we will get reversed_string as 'a' that is, reversed_string = i + reversed_string = 'a' + "" = 'a' next again control goes to for loop, now i value becomes 'm', it will execute for loop body, reversed_string = i + reversed_string = 'm' + 'a' = "ma" in this same way it will continue the execution:)

[@Amit-nh2pu]

great!

[@vengateshprasath2906]

Str="David" str[::-1]

[@melissahuerta8315]

thanks for the explanation, at first I was confused too.. reading the string as it was an array like str[I] and in my mind it got the same order.. but now is clear :)

[@sultanahmadsabawoon6030]

still confused. make the code as reversed_string + i. in this case it will give you the same string as entered initially. the trick is that the i value is cancatenated with reversed string not the other way around.

[@klaskycsupo121]

So chars are going to be concatenated from right to left? Did I get this right?

[@riuspablo]

Or >>> string = "amuls" >>> string[::-1]

[@bagavathi5340]

it's a simple method

[@vortex_7574]

Genius!

[@vimukthiaravinda6288]

this is the right method

[@jenre6903]

you just saved me 8 minutes. thank you, you are a legend

[@soulfulman4834]

This is inbuilt method which I use oftenly but it doesn't works in complex programs...

[@shahsikalagowda183]

Too good mam🤍...ur voice next level🙌🏻😇.. understood clearly 😍🥰

[@sayanmukherjee7726]

A great explained video, very useful for me for better understanding of for loop iteration. Thank you.

[@raheemabdul4410]

U seem kannadiga from Bangalore..lots of wishes from mangalore

[@Darsky]

Finally! Simple, yet detailed!! Thank you!

[@puria7711]

thank you! i was having a hard time understanding this concept, i really appreciate it! 😀

[@rajlaxmijoshi8741]

Nice explanation, amazing teacher you are 💓

[@moonnyy364]

This video helped me so much! Thank you!

[@AmulsAcademy]

Pleasure :)

[@sambhavsisodia3920]

l,m,n = yell,yem,yen 😂😂😂 ,whatever video was great !

[@AmulsAcademy]

Thank you:)

[@MuhammadNaeem-xj8zp]

Yeh it should be el, am ,an for l, m , n any ways great explanation nice voice

[@rb8934]

the pronunciation differs as per the state

[@soumyashreebiswal14]

@@MuhammadNaeem-xj8zp Its not about whether it SHOULD BE or whatever. Its totally okay to have a different pronounciation.

[@chandanshivalingaiah9861]

Nobodys perfect summbbbhaaavvvvvvvaaa ssuuusssoooddiiiaaaaa so please watch it or get out nobody wants you here anyway

[@mukundmohare310]

excellent explanation Ma'am keep it up and keep growing.👍👍👍

[@kushi5439]

thank you very much ma'am ......very easy way of explanation u had given here.....thanks a lot :) looking many more python videos from you

[@AmulsAcademy]

Thank you :)

[@shreyanshmishra3278]

Superb Explanation!!!

[@learngurututorials8837]

Awesome .. explanation.. i really appreciate you.. 👌👌👌

[@AmulsAcademy]

Thank you :)

[@kishoredev6004]

def rev(x): return x[::-1] rev('forward')

[@gamerjmax5568]

x = input("Enter any name: ") x[::-1]

[@takerixgaming4170]

Magnetic voice mam🔥🔥🔥

[@NewIndianera]

Mam please make a video on ...Any program how it is executed

[@pavanboggarapu4842]

way of explanation is too good thank you soo much

[@AmulsAcademy]

My Pleasure :)

[@balakarna_editz2779]

Nice explanation, please upload python data science videos

[@paramvirsohi5922]

Perfect explanation for interview

[@dabhijaydeep]

Can u make decorator using reverse number and also negative number and also string enter to string reverse in single function

[@AmulsAcademy]

Will try 😊

[@praveentiwari5672]

thanks for explaining everything clearly .........thanks a lot........

[@AmulsAcademy]

My Pleasure :)

[@abuawaish7]

Great explanation mam👍❤️

[@AmulsAcademy]

Thank you :)

[@manproactive6649]

wonderful! how is crystal clear explanation! very helpful for beginners like for me

[@AmulsAcademy]

Thank you 😊

[@NewIndianera]

Mam make video on c++ and html and core and advance java

[@Tripti3434]

amazing explanation till now superb

[@RazaviImran]

This video is nice, i saw your 4 videos today. But this is great, nice explanation. If you able to make video in hindi it will great opportunity for hindi people just like me, i am not good in english

[@AmulsAcademy]

I will start the Hindi channel soon :)

[@phaniinakollu4604]

@@AmulsAcademy explain django ecommerce website

[@amitabhgupta21]

You are very good and your way is best,keep it up

[@AmulsAcademy]

Thank you :)

[@mayank_8348]

It was a great explanation ma'am

[@ralphmachado8201]

hi i learn a lot from your videos and check my below code which is more simply than the above one. print("enter anything to be reversed") x=input() length=len(x) for i in range(length-1,-1,-1): print(x[i],end="")

[@PassionateSaksham]

What the Meaning Of -1,-1,-1 Here Please Answer Me

[@ralphmachado8201]

@@PassionateSaksham 1: length-1 means that the for loop will start from the index number which is one less than the length of the string to be reversed 2: -1 is the number untill which the for loop will run 3: -1 is the amount which will be decremented after every iteration and this will continue until the number reaches till -1.

[@katsukibakugou6216]

thank you so much! please make more videos like this its really helping!

[@AmulsAcademy]

Pleasure 😊

[@Ink_Sack]

Very helpful and easy to understand. Thank you

[@AmulsAcademy]

Glad it was helpful!

[@SPD360ENGLISH]

Very good and neat explanation... Well done...

[@harik1999]

Hello Ma'am,I have started watching your Python programming videos and the sessions were really helpful as you did explained in a nicely manner. Is it possible to navigate all your videos (the concepts + sample program's) please? Also,let me know if any materials are available and then I can take as well if they are chargable?

[@AmulsAcademy]

Sorry I don't have any materials :)

[@ASHGaming-yp9vj]

Really great explanation 🙌

[@kartheekarun2030]

thanks for the explanation at the end it was very helpful.

[@shambhushrestha6926]

love the way you teach

[@AmulsAcademy]

Thank you :)

[@smhproductions295]

Feels super easy after seeing this

[@sureshcement2212]

I just love ur videos buddy

[@someone-x64]

Thankyou : For detailed explanation 😊

[@AmulsAcademy]

Pleasure :)

[@sujithnair232]

Really good explanation, Thank you

[@AmulsAcademy]

Glad it was helpful! :)

[@5151sunil]

Nice explanation.. Thanks..

[@AmulsAcademy]

My Pleasure:)

[@ajinkyarajurkar7457]

can u upload a video on "reverse" which is used everywhere in python like list and reverse operation on some other.. . . like reversing a list kind of

[@AmulsAcademy]

Are you asking about the list.reverse method?

[@shruthi9776]

Fabulous keep going i loved u programmes vry helpful especially during exams😁👍👍👍👏👏👏👏

[@AmulsAcademy]

Thank you:)

[@Tech_Brigadier]

Grate Tutorials, But mam when I was learning python functions I was taught not to use print statements in a function or else the user's rights to edit the returned value will end up

[@davidusharauli2227]

Thanks for reply. but why would for loop add m before a like m+a and not standard way a+m? this part is main part and your reply did not make it clear. if one puts 'amuls'[::-1] it makes sense to reverse. But why would x = i+var should loop from left to write rather than from right to left?

[@AmulsAcademy]

hey, In the string concatenation, 'a' + 'm' is 'am' 'm' + 'a' is 'ma' for i in string: reversed_string = i +reversed_string here string is amuls, so first i value becomes 'a' so for loop executes for i='a', so , reversed_string = i +reversed_string [ here, = 'a' + "" = 'a' [ i = 'a' [ reversed-string = '"" [ empty string ] Now reversed_string is 'a' so next i value becomes 'm' reversed_string = i +reversed_string = 'm' + 'a' ='ma' so reversed_string is 'ma' now. here we are doing, i+reversed_string so we get string is reversed order, that is 'sluma' if we write, reversed_string + i we will get the same string, that is "amuls" :)

[@davidusharauli2227]

Thanks. I got it now. very nice.

[@tusharkhatri5795]

can function name be any keyword here you have written as reverse which i think is reserved word . Pls explain as code is executing

[@hemamanohar15]

hi do you have any video about reversal string but in vertical way. i've tried so many ways but still no solution

[@psiddamma1022]

Thank you mam for clear explanation

[@arfatbagwan48]

thank you so much ma'am god bless you !

[@qasemalharbi38]

Great 👍 I love it please how can we solve it with recursion

[@AmulsAcademy]

Try this: def reverse_string(s): if len(s) == 1: return s else: return reverse_string(s[1:]) + s[0] s = input("enter string:") print("The original string is : ",s) print ("The reversed string is : ",reverse_string(s))

[@NewIndianera]

Mam make video for those who don't know anything about programing even ABCD of it

[@drsmahesan203]

Pythonic way to reverse a string is to use the slice operator E.g. str1 = "Amuls" rev_str = str1[ : : -1] :-)

[@LM-th7dj]

Thank you so much! That was very helpful!

[@AmulsAcademy]

My Pleasure :)

[@jitendranavagire3380]

very good explanation

[@AmulsAcademy]

Thank you :)

[@rexrajan5232]

I think there is not necessary to include function def, For loop is enough to reverse the string. So what's your opinion?

[@paramvirsohi5922]

wow, waht an explanation. I wish I get this fot interview

[@mohammedmujtabaahmed8337]

Excellent video. Thanks@!

[@AmulsAcademy]

Pleasure 😊

[@AliRaza-lv2kf]

whose version use you are?

[@sivapriya3276]

thank you somuch for this wonderful vedio.how to reverse a word using recursion

[@AmulsAcademy]

Thank you :) You can use string slicing method and write the program :)

[@sivapriya3276]

@@AmulsAcademy can you say the program

[@swathiram1116]

Hai mam but getting syntax error like unindent does not match any indentation level what to do pls explain

[@AmulsAcademy]

I think you placed extra space before that statement.

[@komaljaswani7497]

Hi! Can you please make a video on the question: If a list in python has mix of strings & numbers, how will you make separate lists of strings & numbers? I saw ord() for getting ASCII code in python & chr() for converting ASCII codes to characters somewhere & tried to use them to get answer of this question but it did not work!! :(

[@saikiran307]

Good Explanation

[@AmulsAcademy]

Thank you :)

[@jitendranavagire3380]

thank you so much.. these is very helpful to me .

[@AmulsAcademy]

My Pleasure :)

[@abhaysrivastav5664]

You constructed the solution in a more complicated way which can be solved with the easy loop system.

[@saurav031]

can you please add an example of how to reverse words of a given string using for loop. for example given string is "amuls academy of python" and i want the result string as "python of academy amuls". there are many ways to do this using split() and join() method but I want to do this using for loop. Please add a video on this. Thanks

[@AmulsAcademy]

Try this:) sentence = input("enter the input string:") answer = '' temp = '' for char in sentence: if char != ' ' and char!='.': temp += char elif char=='.': answer = char + temp + ' ' + answer temp = '' else: answer = temp + ' ' + answer temp = '' answer = temp + ' ' + answer print(answer)

[@saurav031]

Amuls Academy Thanks for your answer but can you please explain the code or atleast make one video tutorial on this.

[@venkatkrishnan876]

Well explained mam

[@AmulsAcademy]

Thank you 😊

[@sharathcg4697]

clearly understood Thank you.....

[@notmaku3039]

Can we do this using while loop

[@AmulsAcademy]

Yes we can :)

[@moana7771]

We can do this usnig list bcoz usnig def its very long process as u done in vdo

[@AmulsAcademy]

Yes we can :)

[@ananthvenkatreddygaddam3041]

Hi I have written code like this but i am not able to be executing in python 2.x could you please help me def reverse(str): reversed_str="" for i in str: reversed_str= i+reversed_str print("reversed string is:",reversed_str) str=input("enter a string:") print ("entered string",str) reverse(str)

[@AmulsAcademy]

Because you are using python 2, in the output: first a message will display that is, enter a string: here you need to enter string that is, "amuls" [ you need to write your input within the double quotes ] Because In python 3 input() by default treat input as string. But in python 2 input() will evaluate the input. OR you can write code like this: python 2's raw_input is equal to python 3's input() so instead of input() you can use raw_input() def reverse(str): reversed_str="" for i in str: reversed_str= i+reversed_str print "reversed string is:",reversed_str str = raw_input("enter a string:") print "entered string", str reverse(str) here you can enter input without double quotes:)

[@ananthvenkatreddygaddam3041]

Thank you so much!!!!!!!!!!!

[@AmulsAcademy]

welcome:)

[@sandeepsunny9905]

Nice approach

[@anilmacharla6939]

A million Thanks!

[@AmulsAcademy]

Pleasure 😊❤️

[@davidusharauli2227]

I meant why for loop goes from right to left (etc+m+a) rather than left to right (a+m+etc).

[@AmulsAcademy]

for loop goes from left to right only. for i in "amuls": first here i value is 'a' in the next iteration 'm' next 'u' next 'l' next 's' In the for loop body we wrote, reversed_string = i+reversed_string that's why we will get reversed string. if we write , reversed-string = reversed_string +i then we won't get output in the reverse order.

[@davidusharauli2227]

thanks for taking so much time answering. once you said that switching places between i and var is all this code does, I understood it how simply it was.

[@AmulsAcademy]

Welcome:)

[@pslovelife6]

@david Usharauli If you see the reversed_string input is i+ reversed_string, so once reversed_string stores the first letter, it calls the same letter in the given command and concatenates with the other letter which is i, hence it is going in reverse order (reading the output from right to left).

[@GAURAV-xd1pi]

for all the idiots making fun of her pronunciation just don't watch the video, simple!

[@abc70574]

thanks for the help helped me lot

[@AmulsAcademy]

Pleasure :)

[@shankarrio2854]

my python 3.8 compiler for 32 bit does not works

[@AmulsAcademy]

What is the problem? Getting any error ?

[@shankarrio2854]

yaw i got Idle subprocess did not make connection error

[@jumanjiwarlord]

Let’s say the word is Dog. On the first iteration, the D is stored in the empty list. Now on the second iteration, we pick up the o. And we add the o to the list... the list already contains D but the second iteration will be added BEFORE the list. Now we have oD... and so forth... goD. The trick is in the concatenation. i + reversed_string is like o + D. It’s only confusing because we read left to right and this logic is going against our natural tendencies. We just can’t grasp that o being placed BEFORE the D in a concatenated string unless you understand concatenation (and building strings through concatenation). I hope this helps somebody. We’re all at different levels. Some people have mentioned the [::-1] technique. Splicing a list, I believe it’s called? That’s probably the easier way.

[@jumanjiwarlord]

Another thing, it doesn’t even have to be a word. After all, a computer doesn’t know what a Dog is. All it knows is characters. So instead of Dog, let’s use mZy. First iteration is m. m gets stored in an empty list. Second iteration is Z, then we add Z to the list to get Zm and so forth yZm. The point is we’re adding the characters BEFORE the stored list... as stated by i + reversed_string. That’s how it builds in reverse over the course of its iterations.

[@NasirsCodeStudio]

Thanku.... Very helpful

[@AmulsAcademy]

Pleasure :)

[@manuchowdary7848]

good explanation

[@chandrashekharpatil9015]

Nice explanation

[@AmulsAcademy]

Thank you:)

[@sunny14o4-2k]

wrd=input("Please enter a word") wrd=str(wrd) rvs=wrd[::-1] print(rvs) if wrd == rvs: print("This word is a palindrome") else: print("This word is not a palindrome") "could you explain this"

[@AmulsAcademy]

This program is to reverse the entered string and to check whether it is palindrome or not. 1. wrd=input("Please enter a word") you are asking user to enter the string and it will be stored in variable wrd. 2. wrd=str(wrd) if you are using python 3 then no need to write this line. here you are converting entered input to string, but in python 3 by_default whatever the input you enter it will treat that as string. 3. rvs=wrd[::-1] here it will reverse the string. you are using slicing operation here . syntax of slicing is string_name[start:end:step] start - starting integer where the slicing of the object starts. stop - integer until which the slicing takes place. The slicing stops at index stop - 1. step - integer value which determines the increment between each index for slicing. In the above program you didn't mention start and end so it will take entire string. -1 is the step . So, when you do string_name[::-1] , it starts from the end, towards the first, taking each element. So it reverses the string. 4. print(rvs) you are printing the reversed output. 5. if wrd == rvs: print("This word is a palindrome") else: print("This word is not a palindrome") in this if else condition you are checking whether the entered string is palindrome or not. A string is said to be palindrome if reverse of the string is same as string. that's why we are checking wrd==rvs here wrd is the entered input or original string rvs is reversed string if both are same then the string is palindrome if not then not a palindrome. :)

[@vijaysahal4556]

nice 👍👍👍👍👍

[@AmulsAcademy]

Thank you :)

[@estevaofranca5009]

Thanks for sharing this!!

[@kareemsaheb5438]

Good video mam

[@AmulsAcademy]

Thank you :)

[@VishalSoni-te7hy]

def reverse(name): print(len(name)) for i in range(len(name)-1,-1,-1): print(name[i],end="") reverse("Vishal")

[@ilikemathematics1590]

What I do is: String = ‘cool’ lst1=[] For x in string: lst1.append(x) String = “” For x in range(len(lst1)): String += lst1[-x]

[@thesumitkumar0]

#Run_it print(input()[-1::-1])

[@muralinaremurali9014]

love your voice

[@The_WarMachine]

Nice 👍👍

[@AmulsAcademy]

Thank you :)