Python Coding challenge - Day 671| What is the output of the following Python Code?

 

Code Explanation:

1. Importing Pandas

import pandas as pd

We load the pandas library and give it the alias pd.

This allows us to use pandas functions easily, like pd.Series.

2. Creating a Series

s = pd.Series([10, 20, 30, 40, 50])

pd.Series() creates a one-dimensional labeled array.

Here, we create a Series with values: [10, 20, 30, 40, 50].

The default index will be [0, 1, 2, 3, 4].

So, s looks like:

0    10

1    20

2    30

3    40

4    50

dtype: int64

3. Boolean Masking with Condition

s[s % 20 == 0] 

s % 20 == 0 checks which values are divisible by 20.

Result of condition:

[False, True, False, True, False]

Applying this mask gives only the values where condition is True → 20 and 40.

So,

s[s % 20 == 0] → [20, 40]

4. Updating Selected Elements

s[s % 20 == 0] *= 2

This multiplies the selected elements (20 and 40) by 2.

So:

20 → 40

40 → 80

Now the Series becomes:

0    10

1    40

2    30

3    80

4    50

dtype: int64

5. Summing the Series

print(s.sum())

s.sum() adds all values in the Series.

Calculation: 10 + 40 + 30 + 80 + 50 = 210.

So the output is:

210

Final Answer: 210

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