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Reverse a Given String

Certification: Basic Level Accuracy: 77.27% Submissions: 198 Points: 5

Write a Python program to reverse a given string.

Example 1
    
  
  • Input: "hello"
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  • Output: "olleh"
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  • Explanation: 
    
      
      
    • Step 1: Take the last character of "hello", which is "o".
      • 
      
    • Step 2: Take the second last character, which is "l".
      • 
      
    • Step 3: Take the third last character, which is "l".
      • 
      
    • Step 4: Take the fourth last character, which is "e".
      • 
      
    • Step 5: Take the fifth last character, which is "h".
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    • Step 6: Combine all characters in reverse order: "o" + "l" + "l" + "e" + "h" = "olleh".
      • 
      
    • Step 7: Return the reversed string "olleh".
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Example 2
    
  
  • Input: "Python"
    • 
  
  • Output: "nohtyP"
    • 
  
  • Explanation: 
    
      
      
    • Step 1: Take the last character of "Python", which is "n".
      • 
      
    • Step 2: Take the second last character, which is "o".
      • 
      
    • Step 3: Take the third last character, which is "h".
      • 
      
    • Step 4: Take the fourth last character, which is "t".
      • 
      
    • Step 5: Take the fifth last character, which is "y".
      • 
      
    • Step 6: Take the sixth last character, which is "P".
      • 
      
    • Step 7: Combine all characters in reverse order: "n" + "o" + "h" + "t" + "y" + "P" = "nohtyP".
      • 
      
    • Step 8: Return the reversed string "nohtyP".
      • 
    
    
  
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Constraints
    
  
  • 1 ≤ len(string) ≤ 10^6
    • 
  
  • The string contains printable ASCII characters.
    • 
  
  • Time Complexity: O(n), where n is the length of the string.
    • 
  
  • Space Complexity: O(n)
    •
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Hint
Solution

Solution Hints

    
  
  • Use slicing to reverse the string: s[::-1]
    • 
  
  • Use a loop to build the reversed string.
    • 
  
  • Handle edge cases where the string is empty or has only one character.
    •

The following are the steps to reverse the given string: 

  • Define a function: Create reverse_string(input_string)

  • Reverse the string: Use slicing [::-1]

  • Call the function: Pass "Hello, World!"

  • Store the result: Save it in reversed_string

Submitted Code :