Python Coding Challenge - Question with Answer (ID -121225)

 

Step-by-step Explanation

1️⃣ lst = [10, 20, 30]

You start with a list of three numbers.

2️⃣ for i in range(len(lst)):

len(lst) = 3, so range(3) generates:

i = 0
i = 1
i = 2

You will loop three times, using each index of the list.

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3️⃣ Inside the loop: lst[i] += i

This means:

lst[i] = lst[i] + i

Now update values step-by-step:

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▶ When i = 0

lst[0] = lst[0] + 0
lst[0] = 10 + 0 = 10

List becomes:

[10, 20, 30]

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▶ When i = 1

lst[1] = lst[1] + 1
lst[1] = 20 + 1 = 21

List becomes:

[10, 21, 30]
▶ When i = 2

lst[2] = lst[2] + 2
lst[2] = 30 + 2 = 32

List becomes:

[10, 21, 32]

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Final Output

[10, 21, 32]

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Python for GIS & Spatial Intelligence

✅ Summary

This program adds each element’s index to its value.

Index (i)	Original Value	Added	New Value
0	10	+0	10
1	20	+1	21
2	30	+2	32