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Swap Two Variables Without a Temporary Variable

Certification: Basic Level Accuracy: 77.23% Submissions: 224 Points: 5

Write a Python program that swaps the values of two variables without using a temporary variable.

Example 1
    
  
  • Input: a = 5, b = 10
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  • Output: a = 10, b = 5
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  • Explanation: 
    
      
      
    • Step 1: Add the values of both variables: a = a + b = 5 + 10 = 15.
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    • Step 2: Set b equal to a minus b: b = a - b = 15 - 10 = 5.
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    • Step 3: Set a equal to a minus b: a = a - b = 15 - 5 = 10.
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    • Step 4: Now, a = 10 and b = 5, successfully swapped without using a temporary variable.
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    •
Example 2
    
  
  • Input: a = "hello", b = "world"
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  • Output: a = "world", b = "hello"
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  • Explanation: 
    
      
      
    • Step 1: Using Python's multiple assignment feature: a, b = b, a.
      • 
      
    • Step 2: This assigns b's value ("world") to a, and a's value ("hello") to b simultaneously.
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    • Step 3: Now, a = "world" and b = "hello", successfully swapped without a temporary variable.
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Constraints
    
  
  • -10^6 ≤ integer values ≤ 10^6
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  • 1 ≤ len(string) ≤ 100 characters
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  • Time Complexity: O(1)
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  • Space Complexity: O(1)
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NumberVariables and Data TypesPwCKPMG
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Hint
Solution

Solution Hints

      
  • Use arithmetic operations (for numbers): a = a + b; b = a - b; a = a - b
    •   
  • Use XOR operation (for integers): a = a ^ b; b = a ^ b; a = a ^ b
    •   
  • Use tuple unpacking: a, b = b, a
    •  
  • Use array/list assignment: [a, b] = [b, a]

The following are the steps to Swap Two Variables Without a Temporary Variable:

1. Define a function `swap_numbers(a, b)` that takes two numbers.
2. Use `a, b = b, a` to swap the values without a temporary variable.
3. Return the swapped values.
4. Call `swap_numbers(5, 10)` and store the result.
5. Print the swapped numbers.

Submitted Code :