Python Coding Challange - Question with Answer (01221025)

 

Step-by-step explanation:

1. Initialization

   x = 'abcd'

   Here, the variable x is assigned the string 'abcd'.

2. Loop setup

   for i in range(len(x)):

   • len(x) = 4

   • So, range(len(x)) = range(4) → iterates through 0, 1, 2, 3.

3. Inside the loop

   x = 'a'

   • On the first iteration (i = 0), x becomes 'a'.

   • On the next iterations, range(len(x)) was already evaluated as range(4) before the loop began — so it will still run 4 times, even though x changed inside.

   • Each time, x is reassigned to 'a' again (no change after the first time).

4. After the loop

   print(x)

   • The final value of x is 'a'.

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✅ Output:

a

 Key concept:

• range(len(x)) is evaluated once at the start of the loop.

• Changing x inside the loop doesn’t affect how many times the loop runs.

• The loop overwrites x repeatedly, so only the last assignment ('a') remains.

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