Python Coding Challange - Question with Answer (01230525)

 

Step-by-step Explanation:

1. x = 5
   You define a variable x and assign it the integer value 5.

2. Calling double(x)
   You pass x to the function double.

3. Inside the function double(n)
   n receives a copy of the value of x (which is 5).
   The line n *= 2 is the same as n = n * 2, so n becomes 10.

   However, this change only affects the local variable n, not the original x.

4. Back in the main program
   After the function call, x is still 5 because:

   • Integers are immutable in Python.

   • Assigning a new value to n inside the function does not change x.

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✅ Final Output:

print(x)  # Output: 5

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 Key Concept:

In Python, immutable objects like integers, strings, and tuples are passed by value (actually, by object reference, but since they can't change, it's like by value). So any changes inside a function don't affect the original variable.

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