Here in this page I have written a python code which will swap even and odd characters in a string. Before we begin, take a look the following code. I have not included any library here. I have written it out of basic python libraries. Then to generate output, I have given an another empty string. If we do not have an adjacent character then we will skip it. If we have an adjacent character then we will place that character at the beginning of the output and then the current character at the next position of output.
This will be looped till we have any characters left in the string. Once the loop is completed then the output will be printed along with the given string to compare. You can have a look at the output which I have given in the above immediately after the code. Vote count: 2. Welcome to CloudiKnow. Swap even and odd characters in a string Python by Naveen November 10, November 10, How useful was this post? Click on a star to rate it! We are sorry that this post was not useful for you!
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Thread Rating: 0 Vote s - 0 Average 1 2 3 4 5. Thread Modes. My instructions tell me for middle characters is a. This operation will prompt the user for a choice between 'N' for number and 'S' for string b. If the string has an odd number of characters i.
Determine the middle character of the string ii. Display the single middle character to the user. If the string has an even number of characters i. Determine the middle characters of the string ii.
Display the two middle characters to the user. I have everything done except this part. Just calculate the index. That makes two vidaniyas. Thank you for your help, took a bit of tinkering and a lot of loud grunts but I did it.
This is what if finally figured out. View a Printable Version Subscribe to this thread. Default Dark Midnight. Linear Mode.
Change your preferences any time. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. How can I replace even and odd-indexed letters in my strings?
I'd like to replace odd-indexed characters with uppercased letters and even-indexed characters with lowercased ones. This sounds a little like a "do my homework for me" post, but I'll help you out, as I need the training myself. You can do this by breaking down the problem. As I am quite new with python syntax, I'm gonna assume that the user has already given an input to string x. A non-function for loop might be easier to grasp right now like you I am very new to Python as well.
So for me it was easier to understand the for loop before I got into functions. Look at my next post for the same. Learn more. Replacing Odd and Even-indexed characters in a string Ask Question. Asked 4 years, 9 months ago. Active today. Viewed 8k times. Paul Roub Active Oldest Votes. This returns the remainder of a number when divided by 2. In the case of even numbers, that will be 0.
You cannot directly alter a single character in a String, because they are immutable. This means that you cannot change the String itself, but you can assign a new String to the variable.In Python everything is object and string are an object too.
Python string can be created simply by enclosing characters in the double quote. We use square brackets for slicing along with the index or indices to obtain a substring.
Likewise, you can use other operators in string. Remember it will not consider 0 which is G, it will consider word after that is ur.Java Replacing & Removing Characters in Strings
The new value can be related to previous value or to a completely different string all together. With join function, you can add any character into the string. For example, if you want to add a colon : after every character in the string "Python" you can use the following code.
For example, if we have string "" and then if you apply the code for the reverse function as shown below. First here we will split the string by using the command word. This is because x. Summary: Since Python is an object-oriented programming language, many functions can be applied to Python objects.
A notable feature of Python is its indenting source statements to make the code easier to read. Accessing values through slicing - square brackets are used for slicing along with the index or indices to obtain a substring.
In slicing, if range is declared , it can actually fetch the value from range  You can update Python String by re-assigning a variable to another string Method replace returns a copy of the string in which the occurrence of old is replaced with new.
Syntax for method replace: oldstring. In Python, rename method is used to rename a file or directory. It takes two arguments.
Python String Exercise with Solutions
What is an Exception in Python? An exception is an error which happens at the time of execution of a Following command will zip entire directory Python is an object-oriented programming language created by Guido Rossum in It is ideally Home Testing.
Must Learn! Big Data.My attempt was to create two lists and add to them depending on each letter's index using modulo 2. But I am getting errors. I think your code would be clearer if you use different lists and strings for all your needs. Also, I would prefer to use a count variable here for index and not use range, as it's easier to loop through the initial list, and not its range.
Also, don't use index as it will break if you have repetition of letters in your sentence, as index returns the first occurence of the letter only. Posting to the forum is only allowed for members with active accounts. Please sign in or sign up to post. I forgot my password. Derek Derek 8, Points. Hello, I am trying to solve a question in python that goes like this: You are given a string, for example, "abcdefg" and you want to output a c e g bdf Note that there is a space in between each letters in the first output.
Distinct strings with odd and even changes allowed
Code Review Stack Exchange is a question and answer site for peer programmer code reviews. It only takes a minute to sign up. I have to swap the characters in a string before sending said string to a device to show the information sent through a LCD, the method I developed is as follows:.
I want to know if there are any implementations that do this already I feel like I am reinventing the wheel here or, in case there is not, know how to optimize and make this code more resilient, while also making it more readable.
I haven't run the code, but are you sure it does as you expect it to for odd length strings? By padding the last character with a space, you get some For example, inputting "foo" will return "of o".
That doesn't seem quite right to me. I would expect it to return "ofo". I would do something like this. Essentially, when the mod of 2 equals zero, the code behaves exactly like yours does now, but when the mod of 2 equals one, the loop exits one iteration early, avoiding the IndexOutOfRangeException that prompted you to hack in that white space. It's terribly picky and pedantic, but I find it poor form to use the string alias when you're using it as a class.
Seeing a ctor called on a camelCased identifier just looks weird to me. Same goes for things like string. But, like I said, that's just me being nit picky and pedantic. It's not actually a problem.
Also I wanted to intoduce handling null as an exception. Trying to swap a null should generally be treated as an error condition. You may decide that for the sake of simplicity you want to convert a null argument to an empty string or make it return nullthat's up to you, but whatever you do you should explicitly handle it as an edge-case.
Length - 1which has the side effect of making the loop stop short of the final char in a string with an odd length. This behaviour may not be obvious at first so you may prefer to comment or use a variation of one of the other answers to make the behaviour more explicit, but this solution is somewhat more concise than explicit handling of the case where the length is odd.
I chose to make charSwap its own function as a means of separating concerns and making the charSwap function available to future helper functions that may need the functionality, particularly if you are planning to create other string swapping functions with variations on the behaviour of this one. Sign up to join this community. The best answers are voted up and rise to the top. Home Questions Tags Users Unanswered.
Swapping characters pairs in a string Ask Question. Asked 4 years, 2 months ago.
Python list - separate elements by odd/even index
Active 4 years, 2 months ago. Viewed 10k times. Also, should I make this an extension for the string class instead of a method? RubberDuck Oscar Guillamon Oscar Guillamon 1 1 gold badge 7 7 silver badges 20 20 bronze badges. Active Oldest Votes. Dmitry Nogin Dmitry Nogin 5, 1 1 gold badge 13 13 silver badges 35 35 bronze badges.Given two strings, the task is to check whether these strings are meta strings or not.
Meta strings are the strings which can be made equal by exactly one swap in any of the strings. Equal string are not considered here as Meta strings. This article is contributed by Sahil Chhabra akku. If you like GeeksforGeeks and would like to contribute, you can also write an article using contribute.
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Please use ide. Meta Strings Check if two strings can become same after a swap in one string Split the given string into Primes : Digit DP Find lexicographically smallest string in at most one swaps Remove odd frequency characters from the string Longest Palindrome in a String formed by concatenating its prefix and suffix Longest palindrome formed by concatenating and reordering strings of equal length Count maximum occurrence of subsequence in string such that indices in subsequence is in A.
Python program to check if two strings. Returns true if str1 and str2 are meta strings. Return false if both are not of equal length. To store indexes of previously mismatched. If current character doesn't match. Count number of unmatched character. If unmatched are greater than 2. Store both unmatched characters of. Check if previous unmatched of string1. This code is contributed by Nikita Tiwari. String str2. Improved By : Samnitin mittal.