• Home
  • Subscribe
  • Contribute Us
    • Share Your Interview Experience
  • Contact Us
  • About
    • About CSEstack
    • Campus Ambassador
  • Forum & Discus
  • Tools for Geek
  • LeaderBoard
CSEstack

What do you want to Learn Today?

  • Programming
    • Tutorial- C/C++
    • Tutorial- Django
    • Tutorial- Git
    • Tutorial- HTML & CSS
    • Tutorial- Java
    • Tutorial- MySQL
    • Tutorial- Python
    • Competitive Coding Challenges
  • CSE Subject
    • (CD) Compiler Design
    • (CN) Computer Network
    • (COA) Computer Organization & Architecture
    • (DBMS) Database Management System
    • (DS) Data Structure
    • (OS) Operating System
    • (ToA) Theory of Automata
    • (WT) Web Technology
  • Interview Questions
    • Interview Questions- Company Wise
    • Interview Questions- Coding Round
    • Interview Questions- Python
    • Interview Questions- REST API
    • Interview Questions- Web Scraping
    • Interview Questions- HR Round
    • Aptitude Preparation Guide
  • GATE 2022
  • Linux
  • Trend
    • Full Stack Development
    • Artificial Intelligence (AI)
    • BigData
    • Cloud Computing
    • Machine Learning (ML)
  • Write for Us
    • Submit Article
    • Submit Source Code or Program
    • Share Your Interview Experience
  • Tools
    • IDE
    • CV Builder
    • Other Tools …
  • Jobs

How to Reverse String in Python without using Function?

Aniruddha Chaudhari/21078/3
CodePython

The string is nothing but a set of characters. The typical way of reverse the string is to swapping the character positions.

There is a major disadvantage to it. You have to loop over all the characters of the string. Not much convenient.

There is another way of reversing the string in Python.

Python interview questions and answers

Reversing Python string using Extended Slice Syntax

Simple one-liner solution.

Reverse string in Python is very much simple. Simple code as ‘CSEStack'[::-1] reverse the string.

print('CSEstack'[::-1])

Output:

kcatsESC

Though it is a simple Python code, it is important to understand how does the string gets reversed.

This syntax of string manipulation is called as Extended Slice Syntax. It is defined as

[begin: end: step]
  • begin: Begin defines the starting index of string to clip. If you don’t mention the “begin” index value, it takes default as the index 0.
  • end: End defines the last index of string to be sliced. If you don’t mention the “end” index, it takes default as the last index of string
  • step: It defines steps to be jumped from one char to next char. The default step value is 1.

This feature was added in all the versions after Python 2.3. This is also supported on Python 3.

This is one of the simple Python tricks for competitive coding.

Code to Reverse String in Python without Using Function

strName = 'CSE' 
print(strName[::-1])

Output:

ESC

Extended slice syntax also works for the List in Python.

You can use this technique to identify if the given string is palindrome or not.

There are many different ways of reversing a string in Python. This is the simplest one to reverse string in Python without using function.

You can try these program related to the reversing string.

  • Program to reverse each word in the sentence
  • Program to reverse a string without affecting special characters

Python Interview Questions eBook

Pythonpython string
Aniruddha Chaudhari
I am complete Python Nut, love Linux and vim as an editor. I hold a Master of Computer Science from NIT Trichy. I dabble in C/C++, Java too. I keep sharing my coding knowledge and my own experience on CSEstack.org portal.

Your name can also be listed here. Got a tip? Submit it here to become an CSEstack author.

Comments

  • Reply
    Raman
    October 10, 2020 at 8:51 pm

    Thanks for this detailed explanation.

    • Reply
      Aniruddha Chaudhari
      October 11, 2020 at 11:58 am

      You’re welcome, Raman!

  • Reply
    Nikitha Nischal
    October 23, 2020 at 11:47 pm

    Shouldn’t the print statement be like this:

    print(str[::-1])

    If not enclosed in parentheses, it throws an error.

Leave a Reply Cancel reply

Basic Python Tutorial

  1. Python- Tutorial Overview
  2. Python- Applications
  3. Python- Setup on Linux
  4. Python- Setup on Windows
  5. Python- Basic Syntax
  6. Python- Variable Declaration
  7. Python- Numeric Data Types
  8. Python- NoneType
  9. Python- if-else/elif
  10. Python- for/while else
  11. Python- User Input
  12. Python- Multiline User Input
  13. Python- String Formatting
  14. Python- Find Substring in String
  15. Python- Bitwise Operators
  16. Python- Range Function
  17. Python- List
  18. Python- List Vs Tuple
  19. Python- Compare Two Lists
  20. Python- Sorting List
  21. Python- Delete Element from List
  22. Python- Dictionary
  23. Python- ‘is’ vs ‘==’
  24. Python- Mutable vs Immutable
  25. Python- Generator & Yield
  26. Python- Fibonacci Generator
  27. Python- Assert Statement
  28. Python- Exception Handling 
  29. Python- RegEx
  30. Python- Lambda Function
  31. Python- Installing Modules
  32. Python- Important Modules
  33. Python- Find all Installed Modules
  34. PyCharm- IDE setup
  35. Python- File Handling
  36. Python- Monkey Patching
  37. Python- Decorators
  38. Python- Instance vs Static vs Class Method
  39. Python- Name Mangling
  40. Python- Working with GUI
  41. Python- Read Data from Web URL
  42. Python- Memory Management
  43. Python- Virtual Environment
  44. Python- Calling C Function

Python Exercise

  1. Python- Tricky Questions
  2. Python- Interview Questions (60+)
  3. Python- Project Ideas (45+)
  4. Python- MCQ Test Online
  5. Python- Coding Questions (50+)
  6. Python- Competitive Coding Questions (20+)

Python String

  1. Reverse the String
  2. Permutations of String
  3. Padding Zeros to String/Number

Python List

  1. Randomly Select Item from List
  2. Find Unique Elements from List
  3. Are all Elements in List Same?

Python Dictionary

  1. Set Default Value in Dictionary
  2. Remove all 0 from a dictionary

File Handling

  1. Python- Read CSV File into List
  2. Check if the File Exist in Python
  3. Find Longest Line from File

Compilation & Byte Code

  1. Multiple Py Versions on System
  2. Convert .py file .pyc file
  3. Disassemble Python Bytecode

Algorithms

  1. Sorting- Selection Sort
  2. Sorting- Quick Sort

Other Python Articles

  1. Clear Py Interpreter Console
  2. Can I build Mobile App in Python?
  3. Extract all the Emails from File
  4. Python Shell Scripting

© 2022 – CSEstack.org. All Rights Reserved.

  • Home
  • Subscribe
  • Contribute Us
    • Share Your Interview Experience
  • Contact Us
  • About
    • About CSEstack
    • Campus Ambassador
  • Forum & Discus
  • Tools for Geek
  • LeaderBoard