Python Coding Challenge - Question with Answer (ID 010826)

 

Explanation:

🔹 Line 1: print(1_2 + 3)

This line tells Python to:

Evaluate the expression 1_2 + 3

Print the final result.

🔹 Part 1: 1_2

At first glance, it looks strange, but it's completely valid in Python.

1_2

What is _ doing?

The underscore (_) is a digit separator in numeric literals.

It is ignored by Python and only improves readability.

So,

1_2

is interpreted as

12

🔹 Why is this allowed?

Python lets you place underscores between digits to make large numbers easier to read.

Examples:

1_000      # 1000

10_000     # 10000

1_000_000  # 1000000

The underscores have no effect on the value.

🔹 Part 2: + 3

Now the expression becomes

12 + 3

Python performs normal integer addition.

Result:

15

🔹 Part 3: print()

Finally,

print(15)

prints

15

🔹 Step-by-Step Evaluation

print(1_2 + 3)

↓

print(12 + 3)

↓

print(15)

↓

15

🎯 Final Output

15

Book: 100 Python Challenges to Think Like a Developer