swap_numbers.py

python
# Function to swap two numbers
def swap_numbers(a, b):
    """
    Swaps two numbers using a temporary variable
    
    Args:
        a: First number
        b: Second number
        
    Returns:
        Tuple of (a, b) after swapping
    """
    print(f"Before swap: a = {a}, b = {b}")
    
    # Swapping logic
    temp = a
    a = b
    b = temp
    
    print(f"After swap: a = {a}, b = {b}")
    return a, b

# Alternative method without temporary variable (using arithmetic)
def swap_without_temp(a, b):
    """
    Swaps two numbers without using temporary variable
    
    Args:
        a: First number
        b: Second number
        
    Returns:
        Tuple of (a, b) after swapping
    """
    print(f"Before swap: a = {a}, b = {b}")
    
    a = a + b
    b = a - b
    a = a - b
    
    print(f"After swap: a = {a}, b = {b}")
    return a, b

# Example usage
if __name__ == "__main__":
    num1 = 5
    num2 = 10
    
    # Using temporary variable
    swapped1, swapped2 = swap_numbers(num1, num2)
    
    print("\nAlternative method:")
    # Using arithmetic operations
    swapped1, swapped2 = swap_without_temp(num1, num2)

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