Later on in our code, we will use the input() method and will store it in a variable say n. this will take an integer as input and it will represent the amount of time we want to repeat our string. For android TextUtils.join() can be used instead of String.join(). Please don't use built-in types(str, int etc..) as variables in your program, it shadows its actual meaning. I really have a hard time seeing how anyone could read what I wrote and seriously think the responses typed above. My edited answer is loop-free as requeted. i've been stuck on a question for some time now: I'm looking to create a python function that consumes a string and a positive integer. # Multiply the Given string with the above given number in order to get a repeated string. Python program to repeat M characters of a string N times By Signing up for Favtutor, you agree to our Terms of Service & Privacy Policy. What are Python loops? How to repeat String N times in Java - Studytonight It never includes this number, 'step' represents the number to add (increment) with. a straightforward one-line solution: Well, to Repeat in Python refers to repeating a section of code in order to achieve a certain result. public class Main { public static void main (String [] args) { String str = "Studytonight"; System.out.println (str); // Repeat String String newStr = str.repeat (3); System.out.println (newStr); } } Studytonight We will use method Sting.repeat (N) (since Java 11) and using regular expression which can be used till Java 10. How to automatically change the name of a file on a daily basis, Avoiding memory leaks and using pointers the right way in my binary search tree implementation - C++. Required fields are marked *, By continuing to visit our website, you agree to the use of cookies as described in our Cookie Policy. You can make. @ChssPly76 at this point I'm pretty sure imagist is trolling. Is it better to use swiss pass or rent a car. We then use the format() method to replace the curly braces with the string N times. I want to print a character or string like '-' n number of times. Not the answer you're looking for? The code example below shows how to repeat a string to a certain length with a user-defined function. How can I fix it? What is a pythonic way to print a string multiple times on one line, separated by spaces? They don't have to worry that I attempted to write my own version of repeat and made a mistake. Three ways to repeat a string in JavaScript - Medium Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. First, you will take any string, in this case, I will use a variable called "string" to store our desired string and then we will use separators on the string. Nearly every answer proposes a static function as a solution, but thinking Object-Oriented (for reusability-purposes and clarity) I came up with a Solution via Delegation through the CharSequence-Interface (which also opens up usability on mutable CharSequence-Classes). For instance, If we have a list myList= [1,2,3,4,5] and we have to repeat the elements of the list two times, the output list will become [1,2,3,4,5,1,2,3,4,5,1,2,3,4,5]. In this article, we will learn how to repeat a string N times in python and also create a function that you can use easily in your code. This question already has answers here : Understanding recursion [closed] (20 answers) Closed 9 months ago. @zyxue yes, it might be better idea to change the statement as you said. python - How can I use recursion to repeat a string? - Stack Overflow To subscribe to this RSS feed, copy and paste this URL into your RSS reader. A basic loop includes the following operations: Take a look at the image below to understand how a basic loop works: Now, that you've familiarized yourself with loops, let's move on to the loop offered by Python to iterate n times. You'll get the answer soon but first, let's learn more about repeat in Python and how to repeat in Python. Catholic Lay Saints Who were Economically Well Off When They Died. How can the language or tooling notify the user of infinite loops? Using the * operator 1 2 3 4 5 lst = [2, 4, 6, 11] lst_new = lst * 3 print(lst_new) Output: [2, 4, 6, 11, 2, 4, 6, 11, 2, 4, 6, 11] It is the simplest way to repeat the string. Conclusions from title-drafting and question-content assistance experiments Python - concatenate a string to itself, multiple times. You will receive a link to create a new password. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide, The future of collective knowledge sharing, Does the required output have a trailing space after the second. Continue with Recommended Cookies. Using while loop (Functional means) What are Python loops? Big-O, not LoC. The while loop is another way to iterate n times in Python. Test your function on the file test.txt in Part (a). Does anyone know what specific plane this is a model of? Print multiple strings on the same line in a loop, Print String multiple times on the same line, Use same variable multiple times in print. Was the release of "Barbie" intentionally coordinated to be on the same day as "Oppenheimer"? # here, the fruit is temporary variable while fruits is the list, # Program: using range() function in Python, # Problem : get a sequence of natural numbers from 1 to 6, # Note that the number n is 1 more than the last digit, # Program: Defining and calling functions, # Program: Using itertools.repeat() function to repeat n times in Python, # import repeat function from itertools module, # Program: Using numpy.repeat() function to repeat n times in Python, "/usr/lib/python3/dist-packages/numpy/core/fromnumeric.py", # Program: Using pandas module to repeat n times in Python, # Program: To repeat a string n times in Python, Boundary Traversal of Binary Tree (with code), Find Distance between Two Nodes of a Binary Tree (with code), Maximum Circular Subarray Sum (with code), 'Start' represents the number to begin the sequence with, 'stop' represents the number to end the sequence at. We used the repeat() function to repeat the string txt to the length 10 and displayed the output. What's the purpose of 1-week, 2-week, 10-week"X-week" (online) professional certificates? Why are my film photos coming out so dark, even in bright sunlight? The Input/Separator are not only limited to String-Class, but can be every Class which implements CharSequence (e.g. Note:- I have assumed the value of n to be 3 in the above example although you can take any value you want for n. Duplicate lines. python - Display (print) string multiple times (repeatedly) - Stack He has over 4 years of experience with Python programming language. Hiding the error and throwing an NPE are not cool, so I passed the error. 7 JavaScript Concepts That Every Web Developers Should Know. In this tutorial, we will learn the methods to repeat a string n times in Python. Why is a dedicated compresser more efficient than using bleed air to pressurize the cabin? thank you! Thus it is required to work with arrays of chars. How do I execute a program or call a system command? Edited. Asking for help, clarification, or responding to other answers. Rather saying that by writing less code, and using library functions rather than reinventing the wheel I reduce the bug surface area(Lines of Code) while increasing readability. Very interesting . With all the other methods you have a terminating joining character that needs to be stripped out in a separate operation. Types of loops in Python 1.1.1. Again, so does whatever solution you use. (adsbygoogle = window.adsbygoogle || []).push({}); Your email address will not be published. This method works by creating a list of N copies of the string, and then joining them together using a delimiter. Get Help Now. Using for loop (Sequential means) 2.2. A loop is used to execute a set of instructions or a block of code several times without having to write it again. Note that we've actually depicted how value is counted rather than repeating the same code n times. The easiest way to repeat a string n times is to use the Python * operator. When your looking for a 'simple' solution, including external libraries should really be a last resort if a better alternative exists. Repeating a string in Java - similar to Python's one line simplicity, returning a String with X repeated characters without a loop, More elegant way to repeat and join a known string an unknown number of times, repeating specific characters in string java. There is a lot of knowledge and styles. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide, The future of collective knowledge sharing, This is mentioned in the Built-in Types section of the docs (and should be mentioned in the official tutorial). Syntax: <string_variable_name1> * N where N = 1,2,3n OR Using a pre-built function only tucks it under more covers. So e5, I think the best way to do this would be to simply use the above mentioned code,or any of the answers here. He loves solving complex problems and sharing his results on the internet. "Print this diamond" gone beautifully wrong. For loops often reuse the same variables, increasing the chance of really hard to find scoping bugs. Here is an example: In this example, we first create a list of N copies of the string using a list comprehension. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Primitive types (, While this is very clever (+1) I think it pretty much proves the point that for loops often make for clearer code. the count up is a great way to approach it. In response to your criticisms: here is the latest Stringutils.java StringUtils.java. Now, that we've encountered an error in 1-D array, let's try to repeat() for a 2-Dimensional array with different axis values: Note the difference in the ways the outputs are presented, for the same array but different axis values. FavTutor - 24x7 Live Coding Help from Expert Tutors! We and our partners use cookies to Store and/or access information on a device. repeats is broadcasted to fit the shape of the given axis. Manage Settings I understand that for loops can cause some real issues. How to Repeat N times in Python? (& how to Iterate?) - FavTutor This is a three-step process: Pass a lambda function and the string to the map () function. axisint, optional The axis along which to repeat values. Create NSString by repeating another string a given number of times. Is there a word for when someone stops being talented? You can repeat a string n number of times using a for loop and concatenating the string. I don't think I've ever seen a project over 5000 LOCS that didn't have commons lang. Function that repeats a given string n times and returns the repeated string 0.00/5 (No votes) See more: C++ C Linux macOS the funtion should work in the following way : repeat ( 3, "foo") s and returns "foofoofoo" we have the following code : main.py. Could ChatGPT etcetera undermine community by making statements less significant for us? In this quick tutorial, you learnt about two ways to repeat string in JavaScript. How can I use recursion to repeat a string? Your reasons for not using a for loop are not good ones. This will fail if we separate using '\' Check this : @RushabhPatel This is because '\' is not a valid string, use '\\' instead or r'\', @martineau You are right, then it should have been '\\', Display (print) string multiple times (repeatedly), Improving time to first byte: Q&A with Dana Lawson of Netlify, What its like to be on the Python Steering Council (Ep. You can also try putting an array (like [1,2]) as repetitions in the function. 592), Stack Overflow at WeAreDevelopers World Congress in Berlin, Temporary policy: Generative AI (e.g., ChatGPT) is banned. It is a one-dimensional array that can hold any form of data. Happy Coding! It is an atomic cognitive unit! How do I print these hash symbols using a loop? Maisam is a highly skilled and motivated Data Scientist. St. Petersberg and Leningrad Region evisa. Of course it has a loop inside, but it's not quite as simple. Sometimes you may need to repeat a string multiple times in Python. When using Counter in Python how would I change the number of occurrences in a dictionary from numbers to asterisks(*)? I wanted a function to create a comma-delimited list of question marks for JDBC purposes, and found this post. Well, there are three ways to handle if s is null. What information can you get with only a private IP address? Hide the error (return ""), 3. If you are using Java <= 7, this is as "concise" as it gets: In Java 8 and above there is a more readable way: Finally, for Java 11 and above, there is a new repeat(int count) method specifically for this purpose(link). -1. The above lines of code will display the following outputs: Similarly, it is also possible to repeat any part of the string by slicing. # and store it in another variable. Apparently I was too tired yesterday. Why is the Taz's position on tefillin parsha spacing controversial? repetd_strg = gven_strng*multpr. In Python, we can easily repeat a string as many times as you would like. Sometimes you want to repeat a string up to a given length. A general for loop in Python looks like this: Let's take an example depicting the iteration over a sequence in Python: Here, 'fruit' represents each element in the list of' fruits'. Is there an equivalent of the Harvard sentences for Japanese? So here's the code if anybody wants to try it: It takes 2 arguments, the first is the number of iterations (each function run with repeat times arg from 1..n) and the second is the string to repeat. "Fleischessende" in German news - Meat-eating people? Asking for help, clarification, or responding to other answers. To repeat a string in Python, We use the asterisk operator " * " The asterisk. How to repeat a string multiple times with spaces? 7 JavaScript Concepts That Every Web Developers Should Know, Variable Hoisting in JavaScript in Simple Words, Difference between Pass by Value and Pass by Reference in JavaScript. into a utility class in your project. If inserted in a method, arguments should be tested (times>=0), errors thrown etc.This adds robustness but also lines of code to read. While loop 2. Can I multiply strings in java to repeat sequences? Repeating the elements of an array intends that each element of the array is repeated n times and a new array is created with these repeated values. Does this definition of an epimorphism work? There are no requests about efficiency. Practice The numpy.repeat () function repeats elements of the array - arr. This operator works by multiplying a string by a number, which results in the string being repeated that many times. Using recursion, you can do the following (using ternary operators, one line max): I know, it's ugly and probably not efficient, but it's one line! How difficult was it to spoof the sender of a telegram in 1890-1920's in USA? Given that a for-loop is the idiomatic way to do this, it would be much easier to figure out if you did it with a for loop. Python offers an in-built function that generates a sequence of numbers. Mate justa quick query , will this leave a trailing space after 2nd string? I created a recursive method that do the same thing you want.. feel free to use this i have the same answer on Can I multiply strings in java to repeat sequences? Find centralized, trusted content and collaborate around the technologies you use most. rev2023.7.24.43542. But what if I were to tell you that you can use this * operator to repeat the string n times in Python? In python, there is no built-in method for it, so we have to implement our own logic inside a function. We have to use the * operator and specify the number of times we want to repeat the whole string. Print the original list using the print () function. Someone reading my code has to figure out what I am doing in that for loop. string = "string" n = 5 repeated_characters = ''.join ( [character*n for character in string]) print (repeated_characters) #Output: ssssstttttrrrrriiiiinnnnnggggg I like the trick of counting up so you can use a default, this is great and easy to understand! I cannot use loops, i must only use recursion. Luckily, python provides an amazing shortcut for this purpose. You can make the solution less ugly and easier to understand: @MonoThreaded I thought it would go without saying, but don't include guava just to do a string repeat. Repeating a string is something unambiguous.Who reads the code knows exactly what a string.repeat does, even without a line of comment or javadoc.If we use a stable library, is reasonable to think that a so-simple function has no bugs,YET introduces some form of "robustness" check that we even need to worry about.If i could ask 10 improvements, this (kind of) things would be one. Connect and share knowledge within a single location that is structured and easy to search. 'repeat' could simply be rewritten using a StringBuilder (setting the initial capacity). You want it simpler and prettier? Making statements based on opinion; back them up with references or personal experience. I don't think it's obfuscated at all. for In the end, we displayed the value of the repeated variable to the user. Recursive concatenation linear invocations (~30x). We then join the list together using an empty delimiter, which results in the string being repeated three times. Find centralized, trusted content and collaborate around the technologies you use most. Method 3: Using itertools.repeat() Method. If the condition is true, the statement is executed. Thanks for contributing an answer to Stack Overflow! I really enjoy this question. This piece of code can be anything, some instructions, arithmetic functions, counter, or simple print operations. What's the DC of a Devourer's "trap essence" attack? We added 1 to compensate for the lost values after the decimal point. Repeat string n times with separator in Python - CodeSpeedy If you would like to change your settings or withdraw consent at any time, the link to do so is in our privacy policy accessible from our home page.. Python | Check if string repeats itself - GeeksforGeeks This results in the string being repeated three times, and the output of the program is: Another way to repeat a string N times in Python is to use the join() method. The consent submitted will only be used for data processing originating from this website. How can I convert this half-hot receptacle into full-hot while keeping the ceiling fan connected to the switch? The consent submitted will only be used for data processing originating from this website. You can use this recursive method for you desired goal. nameDuplicated.txt. Here's an alternative solution, using string formatting with a repeated index: This will work well if you know ahead of time exactly how you want to repeat your string. Trying to measure the speed of your implementations like that is not good. @jozzas no mate.No trailing space after second hello. We then initialized the multiple integer variable that determines how many times the original string needs to be repeated to fit the length limit. How to repeat a String N times in Python | bobbyhadz The statement is print ("The original list : " + str (test_list)). In Python, you can create such a repeat list easily using many approaches. What's the point of being cryptic again? 1. Does anyone know what specific plane this is a model of? If you want to specify trailing space explicitly. Hint: you can modify the first argument to. I makes sense that the second one would take much longer. based on fortran's answer, this is a recusive version that uses a StringBuilder: PS: repeat works also for array, List, Set, etc. Connect and share knowledge within a single location that is structured and easy to search. Repeat List N Times in Python [4 Ways] - Java2Blog @imagist I'm avoiding for loops in situations where it costs me readability, and maintainability. But Python offers modules like NumPy and pandas, which have their own repeat() function. texts = l * 3 print(texts) texts will be: ['tutorialexample', 'tutorialexample', 'tutorialexample'] Join all elements in list print(c.join(texts)) Then you will get the result: tutorialexample,tutorialexample,tutorialexample From this code above, we can find we also can use * to repeat python list. The code example below shows how to use the * operator to repeat a string n times. 1. Proof that products of vector is a continuous function. And as I noted before; a bug hunter will probably be expecting you to do this with a for loop, so they'll have an easier time finding it if you use a for loop. When someone sees StringUtils.repeat, they know what I am doing. Functions are essentially a piece of code that you may reuse instead of writing them out several times. The default separator is whitespace although you can take any separator you want. Set m value equal to the length of the word Now store the characters needed to be repeated into a string named repeat_string using slicing. Lost your password? Recursive concatenation log2 invocations (~3x). If you're familiar with other languages, you can also compare that the for loop offered by Python is more similar to the 'for-each' loop in other languages. string, fileName is of the form name.txt, for some string name. Best solution? But why are we discussing Repeat in Python when DRY (don't repeat yourself) is at its peak now? repeatStr.js This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. How many alchemical items can I create per day with Alchemist Dedication? You'll be surprised by the result. If you still have any doubts, solve your queries with our expert python tutors. Not the answer you're looking for? The range() function, though used to produce a sequence of numbers, is also used with for loop as an exit statement (or to keep the count of iterations). To view the purposes they believe they have legitimate interest for, or to object to this data processing use the vendor list link below. Can I multiply strings in Java to repeat sequences? Generate a List of Random Numbers in Python, Insert Data Into an SQLite Database Using Python, Concept of Longest Increasing Subsequence in Python, Fix Python Cannot Concatenate STR and Int Objects Error, Access the Session Variable in JavaScript. is used to repeat a string n (number) of times. The lambda function should repeat each character N times. After 1 million iterations, the garden-variety StringBuilder took 2 seconds (fun1), and the cryptic supposedly more optimal version (fun2) took 30 seconds. Is there a function like. How to Repeat N Times in Python - Its Linux FOSS This method requires the Series() function and repeat() function of the pandas module. Because then you're getting the space in between the two words and putting it in between the hello's. Connect and share knowledge within a single location that is structured and easy to search. By clicking Post Your Answer, you agree to our terms of service and acknowledge that you have read and understand our privacy policy and code of conduct. In case if you want just to repeat any string. 1 This is mentioned in the Built-in Types section of the docs (and should be mentioned in the official tutorial) docs.python.org/library/ Alternatively, if your project uses java libraries there are more options. The repetition operator is denoted by a ' * ' symbol and is useful for repeating strings to a certain length. If you know of any other way to repeat string in JavaScript, do let us know in the comments below. How to create an overlapped colored equation? By default, use the flattened input array, and return a flat output array. Conclusions from title-drafting and question-content assistance experiments Java - Create a new String instance with specified length and filled with specific character. Method 1: Define a function that will take a word, m, and n values as arguments.